521A
Teals family#CDE0E2
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.
About Cosmo 521A
Cosmo No. 25 embroidery floss
- Fiber
- 100% cotton
- Sold as
- about 8 m
Brand Equivalents for Cosmo 521A
The five closest matches in each brand, ranked by CIEDE2000 perceptual color difference.
DMC
Anchor
Madeira
J&P Coates
Sullivans
Classic Colorworks
Weeks Dye Works
Gentle Art Sampler
Valdani
Crescent Colors
Similar Cosmo Colors to 521A
Closest Cosmo threads by perceptual color distance, sorted from most to least similar.
Working 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.
Color Harmonies for Cosmo 521A
Cosmo threads that pair well with 521A, based on color theory harmony rules in CIELAB color space.
Teals Family
Cosmo521A in context with nearby shades from the teals color family.
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.