Cosmo Embroidery Floss

375

Blues family

Need details on Cosmo 375? This medium-dark, moderately saturated blue hand-dyed shade is hex #3D748C, RGB 61, 116, 140. Cross-brand equivalents in Weeks Dye Works, Gentle Art Sampler, and Valdani are listed below — ranked by perceptual similarity — alongside 8 nearby Cosmo shades and color-theory harmony pairings.

Hex
#3D748C
RGB
61, 116, 140
HSL
198°, 39%, 39%
Lab
46.1, -10.9, -18.7
Lightness
39%
Dark
Saturation
39%
Muted
Hue
198°
Family
Blues

Brand Equivalents for Cosmo 375

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

Cosmo 375

Sullivans

Turquoise Dark 45407 87% Good
Wedgewood Light 45115 64% Fair
Wedgewood 45380 60% Fair
Antique Blue Medium 45274 53% Fair
Bright Turquoise Dark 45442 52% Fair

Crescent Colours

Caribbean Waters 050 74% Approx
Tyler Boy Blue 111 66% Approx
Deep Blue Sea 065 46% Fair
Bejeweled 095 40% Fair
Meadow Green 021 28% Fair

Similar Cosmo Colors to 375

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

Working with Cosmo 375

On white fabric
5.2:1
On dark fabric
4.1:1
Temperature
cool
Closest to
indigo

It stands out clearly on both white and dark fabric, so it is an easy, versatile choice for any ground.

Color Harmonies for Cosmo 375

Cosmo threads that pair well with 375, based on color theory harmony rules in CIELAB color space.

Complementary
Opposite on the color wheel — maximum contrast
Analogous
Adjacent hues — smooth, natural transitions
Triadic
Evenly spaced at 120° — vibrant and balanced
Monochromatic
Same hue, different lightness — great for shading

Blues Family

Cosmo 375 in context with nearby shades from the blues color family.

About Cosmo 375

A moderately saturated, medium-dark member of the blues family, Cosmo 375 is a hand-dyed floss with sky blue tones. Stitchers describe its character as deep and intense, perfect for whale designs and sapphire accents. It blends comfortably into projects centered on porcelain patterns and hydrangea blooms.

Frequently Asked Questions

What does Cosmo 375 look like?

Cosmo 375 is a medium-dark shade in the blues family with hex #3D748C and RGB 61, 116, 140. Stitchers reach for it in projects featuring cool-toned backgrounds and nautical themes.

Which DMC thread matches Cosmo 375?

The closest DMC match for Cosmo 375 is DMC 806 (Peacock Blue Dark) with a 79% match based on visual color similarity. Other near matches include DMC 3810 (Turquoise dark, 75%) and DMC 3760 (Wedgewood (806), 70%).

What Cosmo colors are similar to 375?

The closest Cosmo threads to 375 are 566 (ΔE 4.74), 2024 (ΔE 5.59), and 982 (ΔE 6.65). These are useful substitutes when 375 is unavailable or for building gradients.

When should I use Cosmo 375?

Reach for Cosmo 375 when your project calls for cool-toned backgrounds, nautical themes, winter scenes, forget-me-nots. Its medium-dark character carries both small accents and wider palette work; the harmony picks on this page show natural companions to 375.

What fabric color works best with Cosmo 375?

It stands out clearly on both white and dark fabric, so it is an easy, versatile choice for any ground. For reference, 375 has a contrast ratio of about 5.2:1 on white fabric and 4.1:1 on black. As a cool shade, its cool cast recedes visually — useful for backgrounds, shadows, water and sky, and calm, restful palettes.