Color

#287775

#287775
hex#287775
rgbrgb(40, 119, 117)
hslhsl(178, 50%, 31%)
oklchoklch(0.522 0.075 192.7)
Closest name: Green Sleeves (#39766c)Relative luminance 0.1493

Colors that go with #287775

Charcoal, Crimson and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Real palettes that use #287775

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#77282a

#28774c · #285277

#742877 · #777428

Split-complementary

Open in tool →

#772852 · #774c28

#4c2877 · #77282a · #527728

Contrast

#287775 as textRatioAAAA largeAAAFix
Aaon white
5.27:1passpassfail
  • AAA: use #20605e as the text (7.25:1)
Aaon black
3.99:1failpassfail
  • AA: use #2b827f as the text (4.6:1)
  • AAA: use #38a8a5 as the text (7.31:1)
  • AA: or shift the background to #ededed (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #287775 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #287775
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #287775 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/287775-a2bcbe-d45999-1f282d-e9f1ed?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md