Color

#b9fb56

#b9fb56
hex#b9fb56
rgbrgb(185, 251, 86)
hslhsl(84, 95%, 66%)
oklchoklch(0.913 0.203 128.6)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.7998

Colors that go with #b9fb56

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 →

#9856fb

#fbea56 · #66fb56

#56b9fb · #fb56b9

Split-complementary

Open in tool →

#5666fb · #ea56fb

#56fbea · #9856fb · #fb5666

Contrast

#b9fb56 as textRatioAAAA largeAAAFix
Aaon white
1.24:1failfailfail
  • AA: use #4f8103 as the text (4.69:1)
  • AAA: use #3d6303 as the text (7.04:1)
  • AA: or shift the background to #666666 (4.65:1)
  • AAA: or shift the background to #4a4a4a (7.17:1)
Aaon black
17:1passpasspassPasses 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 #b9fb56 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 #b9fb56
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 #b9fb56 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b9fb56-afbea2-4e5adf-222d1f-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