Color

#42f55d

#42f55d
hex#42f55d
rgbrgb(66, 245, 93)
hslhsl(129, 90%, 61%)
oklchoklch(0.852 0.241 145.2)
Closest name: Cathode Green (#00ff55)Relative luminance 0.6725

Colors that go with #42f55d

Violet, Deep Sky Blue and Hot Pink 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 →

#f542da

#81f542 · #42f5b6

#5d42f5 · #f55d42

Split-complementary

Open in tool →

#b642f5 · #f54281

#4281f5 · #f542da · #f5b642

Contrast

#42f55d as textRatioAAAA largeAAAFix
Aaon white
1.45:1failfailfail
  • AA: use #07881a as the text (4.62:1)
  • AAA: use #056614 as the text (7.2:1)
  • AA: or shift the background to #5c5c5c (4.6:1)
  • AAA: or shift the background to #404040 (7.13:1)
Aaon black
14.45:1passpasspassPasses 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 #42f55d 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 #42f55d
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 #42f55d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42f55d-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