J&P Coates Embroidery Floss

7143 — Cobalt Blue Medium Dark

Blues family

J&P Coates 7143 — Cobalt Blue Medium Dark — has hex #1E4263 and RGB 30, 66, 99. This medium-dark, vivid blue thread sits alongside its closest DMC, Anchor, and Madeira matches below, with 8 similar J&P Coates shades and a panel of color harmonies for palette planning.

Hex

#1E4263

RGB

30, 66, 99

HSL

209°, 53%, 25%

Lab

26.9, -1.1, -23.3

Lightness

25%

Dark

Saturation

53%

Rich

Hue

209°

Family

Blues

Brand Equivalents for J&P Coates 7143

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

J&P Coates 7143 Cobalt Blue Medium Dark

Sullivans

Blue Dark 45226 76% Approx

Wedgewood Dark 45440 73% Approx

Wedgewood Dark 45114 69% Approx

Navy Blue Light 45055 69% Approx

Antique Blue Dark 45273 67% Approx

Cosmo

735 77% Approx 167 70% Approx 166 63% Fair 216 59% Fair 2167 57% Fair

Classic Colorworks

Mermaid's Fin 64% Fair Wavy Navy 50% Fair Morning Glory 49% Fair Milady's Teal 48% Fair Nighty Nite 46% Fair

Weeks Dye Works

Deep Sea 2104 68% Approx Fathom 2102 63% Fair Americana 1307 61% Fair Michael's Navy 1309 56% Fair Twilight 1285 52% Fair

Gentle Art Sampler

Distressed Denim 0293 30% Fair Midnight 0240 28% Fair Island Blue 0940 27% Fair Lagoon 0980 25% Fair Cast Iron Skillet 1060 18% Fair

Valdani

Wedgewood dark 105 86% Good Navy Blue light M5 82% Good Blue very dark 871 80% Good Antique Blue very dark 873 77% Approx Antique Blue dark O126 76% Approx

Crescent Colours

Granny Annie 083 63% Fair

Nighty Nite 160 61% Fair

Blacksmith Blue 187 61% Fair

Blue Beatrice 132 37% Fair

Tartan Plaid 073 37% Fair

Similar J&P Coates Colors to 7143

Closest J&P Coates threads by perceptual color distance, sorted from most to least similar.

J&P Coates 7143 Cobalt Blue Medium Dark

Delft Blue Dark J&P Coates 7981 Very close ΔE 2.68 Cobalt Blue Dark J&P Coates 7100 Very close ΔE 4.34 Sea Blue Dark J&P Coates 7979 Noticeable ΔE 8.03 Delft Blue Medium J&P Coates 7980 Noticeable ΔE 11.51 Sapphire Dark J&P Coates 7182 Noticeable ΔE 11.88 Sea Blue Medium Dark J&P Coates 7978 Noticeable ΔE 15.22 Charcoal Grey Dark J&P Coates 8999 Noticeable ΔE 15.89 Ocean Blue Dark J&P Coates 7024 Noticeable ΔE 16.42

Working with J&P Coates 7143

On white fabric

10.4:1

On dark fabric

2:1

Temperature

cool

Closest to

navy

It has moderate contrast on both light and dark fabric — usable on either, but test a few stitches on your chosen ground first.

Blending & gradients

Because J&P Coates 7981 (Delft Blue Dark) is so near (ΔE 2.68), the pair makes a natural two-step gradient — handy for shading skin, petals, or skies without a hard seam.

Color Harmonies for J&P Coates 7143

J&P Coates threads that pair well with 7143, based on color theory harmony rules in CIELAB color space.

Complementary

Opposite on the color wheel — maximum contrast

7143

6269 Avocado Dark

Analogous

Adjacent hues — smooth, natural transitions

7143

7024 Ocean Blue Dark 7980 Delft Blue Medium

Triadic

Evenly spaced at 120° — vibrant and balanced

7143

5382 Fudge Dark 6212 Sea Green Dark

Monochromatic

Same hue, different lightness — great for shading

7143

7978 Sea Blue Medium Dark 7030 Wedgewood Light 7976 Copen Blue Light

Blues Family

J&P Coates 7143 in context with nearby shades from the blues color family.

7143 Cobalt Blue Medium Dark 7143 7978 Sea Blue Medium Dark 7978 7182 Sapphire Dark 7182 7979 Sea Blue Dark 7979 7100 Cobalt Blue Dark 7100 7981 Delft Blue Dark 7981 7160 Delft Blue Very Dark 7160 7982 Delft Blue Very Dark 7982

About J&P Coates 7143

J&P Coates 7143 is the floss known as Cobalt Blue Medium Dark: a vivid, medium-dark member of the blues family with sky blue tones. Its tone is deep and vivid, making it a popular choice for whale designs and sapphire accents. It pairs nicely in designs that call for porcelain patterns or hydrangea blooms.

Frequently Asked Questions

What does J&P Coates 7143 look like?

J&P Coates 7143 (Cobalt Blue Medium Dark) is a medium-dark shade in the blues family with hex #1E4263 and RGB 30, 66, 99. Stitchers reach for it in projects featuring cool-toned backgrounds and nautical themes.

Which DMC thread matches J&P Coates 7143?

The closest DMC match for J&P Coates 7143 (Cobalt Blue Medium Dark) is DMC 3842 (Wedgewood dark) with a 86% match based on visual color similarity. Other near matches include DMC 312 (Navy Blue light, 82%) and DMC 824 (Blue very dark, 80%).

What J&P Coates colors are similar to 7143?

The closest J&P Coates threads to 7143 are 7981 Delft Blue Dark (ΔE 2.68), 7100 Cobalt Blue Dark (ΔE 4.34), and 7979 Sea Blue Dark (ΔE 8.03). These are useful substitutes when 7143 is unavailable or for building gradients.

When should I use J&P Coates 7143?

Reach for J&P Coates 7143 (Cobalt Blue Medium Dark) 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 7143.

What fabric color works best with J&P Coates 7143 (Cobalt Blue Medium Dark)?

It has moderate contrast on both light and dark fabric — usable on either, but test a few stitches on your chosen ground first. For reference, 7143 has a contrast ratio of about 10.4:1 on white fabric and 2:1 on black. As a cool shade, its cool cast recedes visually — useful for backgrounds, shadows, water and sky, and calm, restful palettes.

J&P Coates Color Chart