Color

#cef50a

#cef50a
hex#cef50a
rgbrgb(206, 245, 10)
hslhsl(70, 92%, 50%)
oklchoklch(0.91 0.216 120.7)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.7845

Colors that go with #cef50a

Blue, Crimson and Red 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 →

#310af5

#f5a70a · #58f50a

#0acef5 · #f50ace

Split-complementary

Open in tool →

#0a58f5 · #a70af5

#0af5a7 · #310af5 · #f50a58

Contrast

#cef50a as textRatioAAAA largeAAAFix
Aaon white
1.26:1failfailfail
  • AA: use #6b7f05 as the text (4.5:1)
  • AAA: use #4e5d04 as the text (7.26:1)
  • AA: or shift the background to #666666 (4.56:1)
  • AAA: or shift the background to #4a4a4a (7.04:1)
Aaon black
16.69:1passpasspassPasses 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 #cef50a as the background.

Brands using this color

mcpConnect your agent — build around #cef50a
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 #cef50a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/cef50a-b6bea2-4e7cdf-252d1f-f1efe9?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