Color

#b9fa38

#b9fa38
hex#b9fa38
rgbrgb(185, 250, 56)
hslhsl(80, 95%, 60%)
oklchoklch(0.909 0.218 127.2)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.7897

Colors that go with #b9fa38

Crimson, Red and Plum 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 →

#7938fa

#fada38 · #58fa38

#38b9fa · #fa38b9

Split-complementary

Open in tool →

#3858fa · #da38fa

#38fada · #7938fa · #fa3858

Contrast

#b9fa38 as textRatioAAAA largeAAAFix
Aaon white
1.25:1failfailfail
  • AA: use #578103 as the text (4.62:1)
  • AAA: use #405e02 as the text (7.45:1)
  • AA: or shift the background to #666666 (4.59:1)
  • AAA: or shift the background to #4a4a4a (7.09:1)
Aaon black
16.79:1passpasspassPasses 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 #b9fa38 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 #b9fa38
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 #b9fa38 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b9fa38-b1bea2-4e64df-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