Color

#b1cf3a

#b1cf3a
hex#b1cf3a
rgbrgb(177, 207, 58)
hslhsl(72, 61%, 52%)
oklchoklch(0.806 0.171 120.4)
Closest name: yellowgreen (#9acd32)Relative luminance 0.5428

Colors that go with #b1cf3a

Charcoal, Cornflower Blue 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 →

#583acf

#cfa23a · #67cf3a

#3ab1cf · #cf3ab1

Split-complementary

Open in tool →

#3a67cf · #a23acf

#3acfa2 · #583acf · #cf3a67

Contrast

#b1cf3a as textRatioAAAA largeAAAFix
Aaon white
1.77:1failfailfail
  • AA: use #687b1e as the text (4.73:1)
  • AAA: use #505e17 as the text (7.11:1)
  • AA: or shift the background to #4f4f4f (4.62:1)
  • AAA: or shift the background to #333333 (7.13:1)
Aaon black
11.86:1passpasspassPasses 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 #b1cf3a 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 #b1cf3a
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 #b1cf3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b1cf3a-b5bea2-4e77df-242d1f-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