Color

#bbf631

#bbf631
hex#bbf631
rgbrgb(187, 246, 49)
hslhsl(78, 92%, 58%)
oklchoklch(0.901 0.216 125.9)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.767

Colors that go with #bbf631

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 →

#6c31f6

#f6cf31 · #59f631

#31bbf6 · #f631bb

Split-complementary

Open in tool →

#3159f6 · #cf31f6

#31f6cf · #6c31f6 · #f63159

Contrast

#bbf631 as textRatioAAAA largeAAAFix
Aaon white
1.29:1failfailfail
  • AA: use #5b7f05 as the text (4.68:1)
  • AAA: use #425d04 as the text (7.5:1)
  • AA: or shift the background to #636363 (4.67:1)
  • AAA: or shift the background to #474747 (7.23:1)
Aaon black
16.34:1passpasspassPasses 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 #bbf631 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 #bbf631
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 #bbf631 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bbf631-b2bea2-4e69df-232d1f-f1f0e9?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