Color

#42ff75

#42ff75
hex#42ff75
rgbrgb(66, 255, 117)
hslhsl(136, 100%, 63%)
oklchoklch(0.88 0.234 147.8)
Closest name: Experimintal Green (#4cff7b)Relative luminance 0.7396

Colors that go with #42ff75

Violet, Charcoal and Deep Sky 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 →

#ff42cd

#6eff42 · #42ffd3

#7542ff · #ff7542

Split-complementary

Open in tool →

#d342ff · #ff426e

#426eff · #ff42cd · #ffd342

Contrast

#42ff75 as textRatioAAAA largeAAAFix
Aaon white
1.33:1failfailfail
  • AA: use #008a25 as the text (4.5:1)
  • AAA: use #00661b as the text (7.2:1)
  • AA: or shift the background to #636363 (4.52:1)
  • AAA: or shift the background to #454545 (7.21:1)
Aaon black
15.79:1passpasspassPasses 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 #42ff75 as the background.

Brands using this color

mcpConnect your agent — build around #42ff75
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 #42ff75 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42ff75-a2bead-b959d4-1f2d29-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