18 Crochet Ice Blue and Pearl Gray Winter Snowflake Collar Cardigan Ideas
Ice Blue and Pearl Gray give a crochet winter cardigan a cool two-color palette that works especially well around snowflake motifs and collar details. Ice Blue can make the snowflakes the first feature noticed, while Pearl Gray provides a quieter surrounding field that keeps the collar from becoming visually crowded. Reversing those roles creates a brighter gray snowflake against a distinctly icy background.
The collar deserves particular attention because it sits beside the face, frames the cardigan opening, and often connects directly to the front bands. A snowflake collar can therefore look very different depending on whether the motif, collar background, and front edging share one color or divide the two shades between them.
The tutorials supporting these ideas include an exact snowflake winter cardigan along with classic, collared, ribbed, granny-square, tie-front, and layered cardigan constructions. The Ice Blue and Pearl Gray palettes below are independent adaptations. Follow each credited creator for the actual construction shown in the tutorial rather than assuming the source uses these exact colors or snowflake placements.
Quick List
- Ice Blue Crochet Cardigan With a Pearl Gray Snowflake Collar
- Pearl Gray Crochet Cardigan With an Ice Blue Snowflake Collar
- Ice Blue Crochet Snowflake Collar Cardigan With Pearl Gray Motif Centers
- Pearl Gray Crochet Snowflake Collar Cardigan With Ice Blue Motif Centers
- Ice Blue Crochet Cardigan With Pearl Gray Front Bands and Snowflake Collar
- Pearl Gray Crochet Cardigan With Ice Blue Front Bands and Snowflake Collar
- Ice Blue Yoke and Pearl Gray Crochet Snowflake Collar Cardigan
- Pearl Gray Yoke and Ice Blue Crochet Snowflake Collar Cardigan
- Ice Blue Sleeve and Pearl Gray Crochet Snowflake Collar Cardigan
- Pearl Gray Sleeve and Ice Blue Crochet Snowflake Collar Cardigan
- Pearl Gray Crochet Cardigan With Ice Blue Collar, Cuffs, and Snowflakes
- Ice Blue Crochet Cardigan With Pearl Gray Collar, Cuffs, and Snowflakes
- Ice Blue and Pearl Gray Broad-Stripe Crochet Snowflake Collar Cardigan
- Ice Blue Center-Panel and Pearl Gray Crochet Snowflake Collar Cardigan
- Pearl Gray Granny Crochet Cardigan With Ice Blue Snowflake Collar Motifs
- Ice Blue Crochet Cardigan With a Minimal Pearl Gray Snowflake Collar
- Pearl Gray Crochet Cardigan With Ice Blue Snowflake Collar and Pocket Accents
- Balanced Ice Blue and Pearl Gray Crochet Snowflake Collar Cardigan
Decide Whether Ice Blue or Pearl Gray Should Lead the Snowflake Collar
A collar made primarily in Pearl Gray gives Ice Blue snowflakes a clear field to sit against. This is useful when the motifs are small because the blue can remain concentrated in the details rather than competing with an equally strong background.
An Ice Blue collar creates a different winter effect. Pearl Gray snowflakes appear quieter and can connect naturally to gray front bands, cuffs, or body panels. This direction works well when you want the collar to read as one broad icy section before the individual snowflake shapes become noticeable.
Do not judge the colors only in untouched yarn. Crochet a small sample of the snowflake beside the intended collar background. Motif openings, raised sections, joins, and shadows can all change how distinct Ice Blue and Pearl Gray appear after crocheting.
Connect the Ice Blue and Pearl Gray Collar to the Front Opening
A snowflake collar can look isolated if its colors stop abruptly at the neckline. One useful solution is to continue either Ice Blue or Pearl Gray down the cardigan’s front bands. This creates a visual route from the collar toward the hem and makes the upper motif treatment feel connected to the garment.
The front bands do not need to repeat the complete snowflake pattern. A plain Ice Blue band beneath an Ice Blue-accented collar can provide enough repetition, leaving the snowflakes as the more intricate feature.
If the cardigan construction has only narrow edging rather than a substantial band, keep the accent proportion similarly restrained. Color planning should follow the actual garment structure instead of forcing a wide decorative area where the tutorial does not provide one.
Keep Ice Blue and Pearl Gray Snowflakes Readable Around Cardigan Texture
Snowflake motifs contain multiple points, openings, or branching details, so they need enough visual separation from the collar background. If Ice Blue and Pearl Gray are too similar in value, the motif can become difficult to recognize once worn.
Place the yarns side by side and consider viewing a photo in grayscale when motif visibility matters. If the shades merge, preserve a stronger light-and-dark difference when choosing replacements.
Also avoid giving every nearby cardigan feature equal complexity. If the collar contains repeated snowflakes, simpler body panels or cuffs can keep the upper motif from competing with cables, dense colorwork, or multiple contrasting borders.
1. Ice Blue Crochet Cardigan With a Pearl Gray Snowflake Collar

Use Ice Blue across the main cardigan while Pearl Gray creates the collar field. Ice Blue snowflakes can then return inside or along that gray collar, allowing the main garment color to repeat through the winter motif without recoloring the entire neckline.
Pearl Gray Should Give Ice Blue Snowflakes a Clear Collar Background
Keep enough uninterrupted Pearl Gray around each Ice Blue snowflake for its points and openings to remain distinguishable. If neighboring motifs touch too closely, the blue details can merge into one uneven band.
A plain Pearl Gray section between motifs can be as important as the snowflakes themselves because it creates the visual separation that makes each motif readable.
Ice Blue Should Continue From the Cardigan Into the Pearl Gray Collar Details
Repeating Ice Blue inside the snowflakes connects the collar to the body instead of making the Pearl Gray neckline look like an unrelated addition.
Keep the cuffs or hem primarily Ice Blue if you want the collar to remain the main Pearl Gray statement rather than outlining every cardigan edge.
Creator Credit: tara crochet ☆
2. Pearl Gray Crochet Cardigan With an Ice Blue Snowflake Collar

Reverse the hierarchy by covering most of the cardigan in Pearl Gray and letting Ice Blue control the neckline. Pearl Gray snowflakes can sit within the blue collar so the main body color is repeated in a smaller, more decorative form.
Ice Blue Can Make the Pearl Gray Snowflakes a Distinct Winter Collar Feature
Give the Ice Blue collar enough depth around the motifs so it reads as an intentional color block rather than a narrow line. The Pearl Gray snowflakes then become softer details within that icy field.
If the snowflakes are small, avoid adding several other Pearl Gray shapes to the collar that could make their silhouettes harder to identify.
Pearl Gray Should Remain Broad Below the Ice Blue Collar
Keep the major front and back panels Pearl Gray if the lighter neutral is supposed to lead the garment. A few Ice Blue repeats at the cuffs can connect the neckline to the sleeves without turning the cardigan into an evenly divided two-color piece.
Creator Credit: DIYGuru
3. Ice Blue Crochet Snowflake Collar Cardigan With Pearl Gray Motif Centers

Keep the complete collar Ice Blue and use Pearl Gray only in the inner portions of the snowflakes. This is a more restrained motif treatment than switching entire snowflakes to the neutral shade and allows the blue neckline to remain visually continuous.
Pearl Gray Centers Can Separate Details Inside Ice Blue Snowflakes
Use Pearl Gray where a small inner section can clarify the structure of each Ice Blue motif. Concentrating the neutral in one consistent part of every snowflake produces a clearer repeat than placing gray randomly around the collar.
Check the motifs from normal wearing distance; very tiny internal color changes may disappear even when they look obvious close up.
Ice Blue Should Stay Continuous Around Pearl Gray Snowflake Centers
Preserve enough Ice Blue around each Pearl Gray center to maintain the snowflake’s outer silhouette. If the gray grows too far toward the points, the motif can start to look split into several unrelated pieces.
An Ice Blue front band can continue the collar color cleanly down the cardigan opening.
Creator Credit: MJ’s Off The Hook Designs
4. Pearl Gray Crochet Snowflake Collar Cardigan With Ice Blue Motif Centers

This version keeps the collar quiet and concentrates Ice Blue inside each snowflake. Pearl Gray can then continue into the main cardigan, creating a nearly tonal garment with controlled icy accents around the neckline.
Ice Blue Centers Need Enough Contrast Inside Pearl Gray Snowflakes
If the blue appears only in a tiny motif center, test whether it remains visible against your particular Pearl Gray. A slightly larger Ice Blue section may work better when the snowflake contains open crochet or heavily textured stitches.
Use the same placement on repeated motifs so the accent creates a predictable rhythm around the collar.
Pearl Gray Can Connect the Snowflake Collar to the Main Cardigan
Keeping the collar background and body Pearl Gray prevents the neckline from looking like a separate color block. Ice Blue then functions specifically as the winter detail rather than another major panel color.
Repeat Ice Blue once at the cuffs or a narrow front edge if the motif color needs another reference point.
Creator Credit: VivCrochets
5. Ice Blue Crochet Cardigan With Pearl Gray Front Bands and Snowflake Collar

Let Ice Blue cover the main body and sleeves while Pearl Gray runs from the snowflake collar down both front edges. This creates a continuous neutral frame around the opening and gives the neckline a structural connection to the rest of the cardigan.
Pearl Gray Front Bands Should Continue Cleanly From the Ice Blue Snowflake Collar
If Pearl Gray frames the collar, carrying it down the front avoids an abrupt color stop at the neckline. Keep both sides similar in visible width so the neutral frame feels balanced.
The snowflakes can remain Ice Blue inside the Pearl Gray collar, repeating the dominant body color at the top.
Ice Blue Should Remain Broad Between Pearl Gray Front Bands
Protect a substantial Ice Blue field through each front panel. If the Pearl Gray bands become too wide, the cardigan can look vertically divided rather than blue-dominant.
A Pearl Gray cuff repeat is optional; the front framing may already provide enough neutral surface.
Creator Credit: KnitcroAddict
6. Pearl Gray Crochet Cardigan With Ice Blue Front Bands and Snowflake Collar

Use Pearl Gray through the large body panels and let Ice Blue outline the neckline and front opening. The brighter cool color becomes a long vertical frame, while Pearl Gray snowflakes inside the blue collar connect back to the body.
Ice Blue Front Bands Can Extend the Pearl Gray Snowflake Collar Vertically
Carry Ice Blue consistently from the collar into the opening edge when the construction provides a front band. This strengthens the center line of an open cardigan and stops the snowflake collar from feeling visually detached.
If the collar itself is already broad, keep the lower bands somewhat restrained so they support rather than overpower the motifs.
Pearl Gray Snowflakes Should Echo the Pearl Gray Body
Using Pearl Gray inside an Ice Blue collar lets the body color reappear in a detailed form near the face. Keep enough blue background between gray motifs to prevent them from merging with the main body below.
Creator Credit: AC Crochets
7. Ice Blue Yoke and Pearl Gray Crochet Snowflake Collar Cardigan

Concentrate Ice Blue across the upper cardigan and use Pearl Gray lower down, with the collar combining both shades through snowflake motifs. The upper block can make the collar feel integrated into a larger winter color zone instead of sitting alone at the neckline.
Ice Blue Should Connect the Pearl Gray Snowflake Collar to the Shoulders
Repeat Ice Blue immediately below or around the collar so the winter color does not end at the neckline. A strong upper section can visually support multiple snowflakes better than a tiny isolated blue edge.
Follow a natural garment boundary for the color transition rather than changing shaping simply to accommodate the palette.
Pearl Gray Should Calm the Cardigan Below the Ice Blue Yoke
Once the Ice Blue upper area is established, use Pearl Gray broadly through the lower body so the collar and yoke remain the strongest winter features.
A small Ice Blue cuff detail can repeat the upper section without introducing another large block.
Creator Credit: Hey Carrie
8. Pearl Gray Yoke and Ice Blue Crochet Snowflake Collar Cardigan

Place Pearl Gray across the shoulders and upper body while Ice Blue carries the lower cardigan and parts of the collar. This creates a cooler blue garment with a quieter gray frame near the shoulders.
Pearl Gray Should Give the Ice Blue Snowflakes a Stable Upper Field
Use the gray yoke as visual breathing room around the Ice Blue motif area. If both shoulders also contain numerous blue stripes or shapes, the snowflake collar can lose its distinct identity.
Keep the strongest Ice Blue motif repetition close to the neckline.
Ice Blue Should Continue Broadly Below the Pearl Gray Yoke
Let Ice Blue control the lower front and back so the garment does not become gray-dominant. The shift from Pearl Gray above to Ice Blue below should be broad enough to read as intentional color blocking.
Creator Credit: Briana K
9. Ice Blue Sleeve and Pearl Gray Crochet Snowflake Collar Cardigan

Use Pearl Gray for most of the torso and collar while Ice Blue covers the sleeves and appears again in the snowflake motifs. The repeated blue on both arms gives the small collar motifs enough support elsewhere in the garment.
Ice Blue Sleeves Should Connect Visually to Pearl Gray Collar Snowflakes
Repeat Ice Blue in the snowflakes or a narrow collar edge so the sleeves do not feel detached from the neutral body. A small amount near the neckline can be enough because the sleeves already contribute substantial blue.
Keep the torso primarily Pearl Gray to preserve the framed-body effect.
Pearl Gray Should Separate Ice Blue Sleeves From the Snowflake Collar
A gray shoulder or upper-body area between the Ice Blue sleeves and motif details creates useful spacing. If all three areas touch in blue, they can merge into one large upper color block.
Creator Credit: Yarnspirations
10. Pearl Gray Sleeve and Ice Blue Crochet Snowflake Collar Cardigan

This arrangement reverses the sleeve contrast. Ice Blue fills the body and collar background while Pearl Gray takes over the sleeves and repeats within selected snowflake details.
Pearl Gray Sleeves Can Balance Ice Blue Snowflake Collar Color
Darkening or muting both sleeves with Pearl Gray gives the central Ice Blue body a clear frame. A little Pearl Gray inside the collar then connects the arms to the neckline without requiring gray torso panels.
Ice Blue Should Stay Continuous Between Pearl Gray Sleeves
Keep the front and back largely Ice Blue so the sleeve/body difference remains obvious. If large gray blocks also appear through the torso, the design will shift toward a more evenly mixed palette.
An Ice Blue hem can preserve the central field all the way to the lower edge.
Creator Credit: WONDER NETTING
11. Pearl Gray Crochet Cardigan With Ice Blue Collar, Cuffs, and Snowflakes

Use Pearl Gray as the broad foundation and repeat Ice Blue at three controlled locations: collar, snowflake motifs, and cuffs. This creates a connected winter accent system without dividing the body into large blocks.
Ice Blue Cuffs Should Repeat the Pearl Gray Snowflake Collar Accent
Matching the cuffs to the Ice Blue neckline gives the smaller snowflake color a clear reference at the wrists. Keep the sleeves themselves Pearl Gray so the cuffs remain distinct.
The Ice Blue does not need to cover the hem as well; three repeated locations may already provide enough connection.
Pearl Gray Should Dominate Between Ice Blue Winter Accents
Leave broad gray sections through the torso and sleeves so each Ice Blue area has room to register independently. If blue expands across every edge, the cardigan will no longer feel Pearl Gray-led.
Creator Credit: Krystal Everdeen
12. Ice Blue Crochet Cardigan With Pearl Gray Collar, Cuffs, and Snowflakes

Let Ice Blue cover most of the cardigan while Pearl Gray controls the collar, motifs, and wrist finishing. The neutral becomes a repeated frame color against a broader icy body.
Pearl Gray Cuffs Can Echo the Ice Blue Cardigan’s Snowflake Collar
Use Pearl Gray at both wrists and around the neckline to establish a consistent secondary role. The snowflake motif can combine Pearl Gray with Ice Blue so the collar does not become a completely separate neutral section.
Ice Blue Should Surround Pearl Gray Snowflake Details
Keep enough Ice Blue surface around the collar and cuffs for the gray areas to remain accents. A broad Pearl Gray hem would add another strong boundary and may make the garment feel more evenly divided than intended.
Creator Credit: PassioKnit Kelsie
13. Ice Blue and Pearl Gray Broad-Stripe Crochet Snowflake Collar Cardigan

Use wide Ice Blue and Pearl Gray sections through the cardigan rather than narrow repeated stripes. The snowflake collar can then combine both colors at a smaller scale while the body uses them in large graphic blocks.
Ice Blue and Pearl Gray Stripes Should Stay Broad Below the Snowflake Collar
Wide sections allow each color to establish itself before changing again. Numerous narrow bands beneath a detailed snowflake collar can create too many competing horizontal lines.
Consider how the sleeve stripes relate to the body before committing to repeated color changes.
Pearl Gray Can Separate Ice Blue Snowflakes From Broad Body Stripes
A mostly Pearl Gray collar can act as a visual buffer between Ice Blue snowflakes and the larger striped torso below. This prevents the motifs from disappearing into a nearby blue body band.
Creator Credit: TCDDIY
14. Ice Blue Center-Panel and Pearl Gray Crochet Snowflake Collar Cardigan

Use Ice Blue through the central front areas while Pearl Gray occupies the sides, sleeves, or outer panels. A Pearl Gray collar with Ice Blue snowflakes can continue that center-versus-frame relationship upward.
Ice Blue Center Panels Should Align With Pearl Gray Snowflake Collar Details
Keep the Ice Blue central color visually connected to the neckline rather than stopping it far below the collar. Blue snowflakes or a narrow blue inner edge can provide that link.
Strong vertical contrast makes panel widths noticeable, so compare both front sides before final assembly.
Pearl Gray Side Panels Should Frame Ice Blue Without Crowding the Snowflakes
Keep the outer gray areas simple when the collar already contains repeated motifs. Additional snowflake colorwork down the sides could weaken the vertical panel effect.
Creator Credit: Shylercrochets
15. Pearl Gray Granny Crochet Cardigan With Ice Blue Snowflake Collar Motifs

A granny-based cardigan gives the snowflake idea a natural motif context. Keep most filler or surrounding squares Pearl Gray and concentrate Ice Blue in the collar snowflakes so the neckline has a distinct winter identity.
Ice Blue Snowflakes Need Pearl Gray Space Between Granny Motifs
Avoid placing every upper square in equally strong blue. Gray filler or borders around the snowflake motifs help each shape remain recognizable instead of merging into a continuous patterned yoke.
Check blocked motif dimensions before combining different square designs so the collar area can join cleanly.
Pearl Gray Granny Sections Should Support the Ice Blue Collar
Use Pearl Gray extensively through the lower cardigan and sleeves if you want the snowflake motifs to remain the primary blue feature. Small Ice Blue repeats at cuffs or square centers can connect the palette without turning every motif into a focal point.
Creator Credit: Sirin’s Crochet
16. Ice Blue Crochet Cardigan With a Minimal Pearl Gray Snowflake Collar

This is the quietest snowflake treatment. Keep almost the entire cardigan Ice Blue and use Pearl Gray only for a few small collar snowflakes or a narrow motif line near the neckline.
Pearl Gray Snowflakes Need Repetition on the Ice Blue Collar
One tiny gray snowflake can look accidental on a large blue cardigan. Use a small repeated group or evenly placed motifs so the neutral forms a deliberate collar feature.
Keep plenty of Ice Blue between the motifs to preserve the minimal direction.
Ice Blue Should Remain Uninterrupted Around Pearl Gray Accents
Avoid adding broad gray cuffs, hem bands, and pockets if the goal is a subtle snowflake collar. The large blue field is what makes a small Pearl Gray motif treatment feel intentional.
Creator Credit: Crochet with Tuula Maaria
17. Pearl Gray Crochet Cardigan With Ice Blue Snowflake Collar and Pocket Accents

Pair an Ice Blue snowflake collar with small Ice Blue pocket details on a Pearl Gray body. The lower repetition gives the neckline another reference point without requiring blue sleeves or a full contrasting hem.
Ice Blue Pocket Accents Should Echo the Pearl Gray Snowflake Collar
Use only enough Ice Blue at the pockets to connect them to the neckline. A narrow edge or controlled panel can work better than turning each pocket into a large blue rectangle.
Symmetry matters because strong Ice Blue details on a Pearl Gray front make pocket placement more noticeable.
Pearl Gray Should Separate Ice Blue Pockets From the Snowflake Collar
Leave substantial gray fabric between the neckline and pockets. That space keeps the upper snowflakes and lower accents distinct while still allowing them to belong to the same palette.
Creator Credit: vivi e cuci
18. Balanced Ice Blue and Pearl Gray Crochet Snowflake Collar Cardigan

The final idea gives both shades substantial visual space. Use broad Ice Blue and Pearl Gray body sections, then combine the colors deliberately inside the snowflake collar so neither shade is confined to trim alone.
Ice Blue and Pearl Gray Need Clear Roles Inside the Snowflake Collar
Even in a balanced design, decide which shade forms the snowflake and which forms its immediate background. Giving the motif a clear local hierarchy prevents the collar from becoming visually muddy simply because the overall cardigan uses both colors evenly.
You can reverse the relationship in another body section without reversing every individual snowflake.
Pearl Gray and Ice Blue Should Repeat Across the Full Cardigan
Check the front, back, and sleeves together before finishing. A cardigan can look balanced from the front yet become heavily Pearl Gray or Ice Blue once the sleeves and back are included.
Broad intentional areas are easier to coordinate than many tiny color changes scattered across the garment.
Creator Credit: DIY with gh crochets
Comparing the Ice Blue and Pearl Gray Snowflake Collar Directions
For the strongest Ice Blue-dominant cardigan, ideas 1, 5, 10, 12, 14, and 16 keep large body areas blue while Pearl Gray controls the collar background, panels, cuffs, or small motifs.
For a quieter Pearl Gray body, ideas 2, 6, 9, 11, 15, and 17 concentrate Ice Blue around snowflakes and selected garment details. These options give the winter motif stronger contrast without requiring blue across the entire cardigan.
Ideas 3 and 4 are useful when you want the color variation to stay almost entirely inside the collar itself. Ideas 7 and 8 expand the collar palette into a yoke, while ideas 9 and 10 use contrasting sleeves to distribute the secondary color farther across the silhouette.
Idea 13 provides the strongest broad-stripe treatment, and idea 18 is the most evenly balanced two-color direction. If your priority is making the snowflake collar easy to recognize, start with a quieter body and reserve the most obvious contrast for the neckline.
Conclusion
Ice Blue and Pearl Gray work well for a winter snowflake collar cardigan because the two shades can divide decorative and structural roles without requiring a large multicolor palette. Ice Blue can make snowflakes, yokes, sleeves, or front panels feel distinctly wintry, while Pearl Gray can provide a quieter collar field, body color, border, or framing section.
For a straightforward design, give one color the cardigan body and use the other around the snowflake collar. For stronger integration, continue the collar color into the front bands, cuffs, pockets, or yoke. If you want both colors to share the garment more evenly, use broad blocks or panels instead of scattering small changes through every section.
Whatever direction you choose, test the snowflake against its actual collar background before committing to multiple motifs. The collar should remain readable when worn, and its color treatment should connect naturally to the rest of the cardigan. Use each credited creator’s tutorial for the exact construction and adapt the Ice Blue and Pearl Gray placement only where that structure supports it cleanly.
Frequently Asked Questions
Should Ice Blue or Pearl Gray dominate a snowflake collar cardigan?
Either can lead. Ice Blue creates a stronger icy field and lets Pearl Gray act as a quiet neutral frame, while Pearl Gray provides a softer body that can make Ice Blue snowflakes stand out more clearly.
Choose the dominant shade before planning cuffs, front bands, and sleeves so those secondary decisions reinforce the same hierarchy.
Should Ice Blue snowflakes sit on a Pearl Gray collar?
That is one of the clearest two-color arrangements because the snowflake and background have separate roles. Keep enough Pearl Gray visible between neighboring Ice Blue motifs so their individual points and openings remain recognizable.
If your actual yarns are similar in value, test the combination in crochet rather than relying on the skeins alone.
Can Pearl Gray snowflakes work on an Ice Blue cardigan?
Yes. Pearl Gray snowflakes create a quieter contrast and can coordinate especially well when gray also appears at the cuffs, front edging, sleeves, or side panels.
For small motifs, make sure the gray remains visually distinct enough from the Ice Blue background.
Where should the snowflake collar color repeat on the cardigan?
Front bands are a natural choice because they continue directly from the neckline. Cuffs, pocket edges, a narrow hem detail, or selected yoke sections can also repeat the collar color.
You do not need to use the accent at every location. Two or three connected repeats are usually enough to establish the palette.
How can I keep an Ice Blue and Pearl Gray snowflake collar from looking too busy?
Give the snowflakes a relatively simple background and avoid placing equally complicated colorwork immediately below them. If the collar already contains repeated motifs, plain body panels or restrained front bands give the eye somewhere to rest.
Broad color blocks are also easier to coordinate with snowflakes than numerous narrow stripes.
How can I check whether Ice Blue and Pearl Gray have enough contrast?
Crochet a small sample of the actual snowflake and place it against the intended collar color. Look at it from normal viewing distance as well as close up.
You can also photograph the sample and view it in grayscale. If the motif nearly disappears and you want clear definition, choose replacements with greater light-and-dark separation.
How do I substitute Ice Blue or Pearl Gray without changing the whole cardigan palette?
Preserve each shade’s role. If Ice Blue is the clearer accent, choose another cool light blue that remains distinguishable from the gray. If Pearl Gray provides the quieter neutral field, choose a gray that still gives the snowflake enough separation.
Compare the replacement shades together in the intended crochet texture, because the relationship between the finished colors matters more than matching an exact shade name.