Color

#42cd56

#42cd56
hex#42cd56
rgbrgb(66, 205, 86)
hslhsl(129, 58%, 53%)
oklchoklch(0.749 0.2 145.5)
Closest name: Battletoad (#11cc55)Relative luminance 0.4549

Colors that go with #42cd56

Blue, Charcoal and Royal 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 →

#cd42b8

#72cd42 · #42cd9c

#5642cd · #cd5642

Split-complementary

Open in tool →

#9c42cd · #cd4272

#4272cd · #cd42b8 · #cd9c42

Contrast

#42cd56 as textRatioAAAA largeAAAFix
Aaon white
2.08:1failfailfail
  • AA: use #238532 as the text (4.7:1)
  • AAA: use #1b6526 as the text (7.15:1)
  • AA: or shift the background to #454545 (4.61:1)
  • AAA: or shift the background to #262626 (7.28:1)
Aaon black
10.1:1passpasspassPasses 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 #42cd56 as the background.

Brands using this color

mcpConnect your agent — build around #42cd56
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 #42cd56 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42cd56-a2bea9-ae4edf-1f2d27-ecf1e9?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