Color

#42cd85

#42cd85
hex#42cd85
rgbrgb(66, 205, 133)
hslhsl(149, 58%, 53%)
oklchoklch(0.756 0.158 156.3)
Closest name: Emerald Green (#50c878)Relative luminance 0.4651

Colors that go with #42cd85

Charcoal, Blue and Cornflower Blue 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 →

#cd4289

#44cd42 · #42cdca

#8542cd · #cd8542

Split-complementary

Open in tool →

#ca42cd · #cd4244

#4244cd · #cd4289 · #cdca42

Contrast

#42cd85 as textRatioAAAA largeAAAFix
Aaon white
2.04:1failfailfail
  • AA: use #238553 as the text (4.61:1)
  • AAA: use #1b653f as the text (7.05:1)
  • AA: or shift the background to #474747 (4.56:1)
  • AAA: or shift the background to #292929 (7.14:1)
Aaon black
10.3:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #42cd85 as the background.

Brands using this color

mcpConnect your agent — build around #42cd85
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 #42cd85 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42cd85-a2beb3-d459d4-1f2d2c-e9f1e9?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