Color

#508b66

#508b66
hex#508b66
rgbrgb(80, 139, 102)
hslhsl(142, 27%, 43%)
oklchoklch(0.586 0.085 155.2)
Closest name: Illuminati Green (#419168)Relative luminance 0.2113

Colors that go with #508b66

Charcoal, Champagne and Copper 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 →

#8b5076

#588b50 · #508b83

#66508b · #8b6650

Split-complementary

Open in tool →

#83508b · #8b5058

#50588b · #8b5076 · #8b8350

Contrast

#508b66 as textRatioAAAA largeAAAFix
Aaon white
4.02:1failpassfail
  • AA: use #4a825f as the text (4.52:1)
  • AAA: use #386147 as the text (7.07:1)
  • AA: or shift the background to #141414 (4.58:1)
Aaon black
5.23:1passpassfail
  • AAA: use #60a479 as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #508b66 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #508b66
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 #508b66 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/508b66-a2beaf-c659d4-1f2d2a-eaf1e9?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