Color

#b9d30d

#b9d30d
hex#b9d30d
rgbrgb(185, 211, 13)
hslhsl(68, 88%, 44%)
oklchoklch(0.819 0.189 118.4)
Closest name: Badass Grass (#b4da55)Relative luminance 0.5693

Colors that go with #b9d30d

Cornflower Blue, Deep Sky Blue and 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 →

#280dd3

#d38b0d · #56d30d

#0db9d3 · #d30db9

Split-complementary

Open in tool →

#0d56d3 · #8b0dd3

#0dd38b · #280dd3 · #d30d56

Contrast

#b9d30d as textRatioAAAA largeAAAFix
Aaon white
1.7:1failfailfail
  • AA: use #6d7d08 as the text (4.58:1)
  • AAA: use #505b06 as the text (7.39:1)
  • AA: or shift the background to #525252 (4.61:1)
  • AAA: or shift the background to #363636 (7.13:1)
Aaon black
12.39:1passpasspassPasses 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 #b9d30d 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 #b9d30d
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 #b9d30d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b9d30d-b7bea2-4e81df-252d1f-f1eee9?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