Cosmo Embroidery Floss

521A

Teals family

Cosmo 521A has hex #CDE0E2 and RGB 205, 224, 226. This light, muted teal thread sits alongside its closest DMC, Anchor, and Madeira matches below, with 8 similar Cosmo shades and a panel of color harmonies for palette planning.

Hex
#CDE0E2
RGB
205, 224, 226
HSL
186°, 27%, 85%
Lab
87.9, -5.9, -3.1
Lightness
85%
Very light
Saturation
27%
Muted
Hue
186°
Family
Teals

Brand Equivalents for Cosmo 521A

Top 5 closest matches in each brand, ranked by visual color similarity. How matching works

Cosmo 521A

Sullivans

Baby Blue Very Light 45195 90% Good
Antique Blue Ultra Light 45377 75% Approx
Blue Ultra Very Light 45477 75% Approx
Blue Ultra Very Light 45229 74% Approx
Grey Green Very Light 45272 71% Approx

Crescent Colours

Snowball 186 66% Approx
Cloud 010 60% Fair
Snips and Snails 087 58% Fair
Baby Blanket 093 53% Fair
Petite Maison 127 50% Fair

Similar Cosmo Colors to 521A

Closest Cosmo threads by perceptual color distance, sorted from most to least similar.

Cosmo 521A
Cosmo 410A Very close ΔE 3.98 Cosmo 730 Very close ΔE 4.08 Cosmo 520 Very close ΔE 4.8 Cosmo 2251 Close ΔE 5.29 Cosmo 2211 Noticeable ΔE 5.84 Cosmo 211 Noticeable ΔE 5.92 Cosmo 411 Noticeable ΔE 6.31 Cosmo 162A Noticeable ΔE 8.17

Working with Cosmo 521A

On white fabric
1.4:1
On dark fabric
15.4:1
Temperature
soft cool
Closest to
silver

It reads best on black or dark fabric and can wash out on white, so reach for a dark or mid-tone ground.

Color Harmonies for Cosmo 521A

Cosmo threads that pair well with 521A, based on color theory harmony rules in CIELAB color space.

Complementary
Opposite on the color wheel — maximum contrast
521A
351 Cosmo 351
Analogous
Adjacent hues — smooth, natural transitions
521A
520 Cosmo 520 2211 Cosmo 2211
Triadic
Evenly spaced at 120° — vibrant and balanced
521A
111 Cosmo 111 711 Cosmo 711
Monochromatic
Same hue, different lightness — great for shading
521A
984 Cosmo 984 982 Cosmo 982 981A Cosmo 981A

Teals Family

Cosmo 521A in context with nearby shades from the teals color family.

521A 521A 521A 211 211 211 2021 2021 2021 2251 2251 2251 896 896 896 562 562 562 980 980 980

About Cosmo 521A

A light, muted entry in the teals family, that's Cosmo 521A. Its tone is subtle and pale, making it a popular choice for sea glass tones and tidepool patterns. It pairs nicely in designs that call for water and sky or tropical motifs.

Frequently Asked Questions

What color is Cosmo 521A?

Cosmo 521A is a light teal shade (hex #CDE0E2, RGB 205, 224, 226) in the teals family, commonly used for peacock feathers, coastal scenes, and similar motifs.

What's the closest DMC match for Cosmo 521A?

The closest DMC match for Cosmo 521A is DMC 3756 (Baby Blue ultra very light) with a 80% match based on visual color similarity. Other near matches include DMC 775 (Baby Blue very light, 69%) and DMC 747 (Sky Blue very light, 62%).

What's a good substitute for Cosmo 521A?

The closest Cosmo threads to 521A are 410A (ΔE 3.98), 730 (ΔE 4.08), and 520 (ΔE 4.8). These are useful substitutes when 521A is unavailable or for building gradients.

What projects use Cosmo 521A?

Cross-stitchers pull Cosmo 521A for charts featuring peacock feathers, coastal scenes, dragonflies, turtle designs. The light tone reads cleanly on its own and slots into multi-color palettes — see the color harmonies below for pairing ideas.

What fabric color works best with Cosmo 521A?

It reads best on black or dark fabric and can wash out on white, so reach for a dark or mid-tone ground. For reference, 521A has a contrast ratio of about 1.4:1 on white fabric and 15.4:1 on black. As a soft cool shade, its cool cast recedes visually — useful for backgrounds, shadows, water and sky, and calm, restful palettes.

Cosmo Color Chart Cosmo ↔ DMC Conversion