Color

#287b3a

#287b3a
hex#287b3a
rgbrgb(40, 123, 58)
hslhsl(133, 51%, 32%)
oklchoklch(0.517 0.127 147.5)
Closest name: Cucumber Queen (#3c773c)Relative luminance 0.1492

Colors that go with #287b3a

Charcoal, Royal Blue and Dark Orchid 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7b2869

#407b28 · #287b64

#3a287b · #7b3a28

Split-complementary

Open in tool →

#64287b · #7b2840

#28407b · #7b2869 · #7b6428

Contrast

#287b3a as textRatioAAAA largeAAAFix
Aaon white
5.27:1passpassfail
  • AAA: use #20642f as the text (7.18:1)
Aaon black
3.98:1failpassfail
  • AA: use #2c873f as the text (4.64:1)
  • AAA: use #38ad52 as the text (7.27:1)
  • 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 #287b3a as the background.

Brands using this color

mcpConnect your agent — build around #287b3a
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 #287b3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/287b3a-a2beab-b84edf-1f2d28-ebf1e9?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