Color

#c9db3d

#c9db3d
hex#c9db3d
rgbrgb(201, 219, 61)
hslhsl(67, 69%, 55%)
oklchoklch(0.851 0.175 115.9)
Closest name: Bitter Lemon (#d2db32)Relative luminance 0.6342

Colors that go with #c9db3d

Charcoal, Cornflower Blue 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 →

#503ddb

#db9f3d · #7adb3d

#3dc9db · #db3dc9

Split-complementary

Open in tool →

#3d7adb · #9f3ddb

#3ddb9f · #503ddb · #db3d7a

Contrast

#c9db3d as textRatioAAAA largeAAAFix
Aaon white
1.53:1failfailfail
  • AA: use #717d17 as the text (4.52:1)
  • AAA: use #525a11 as the text (7.42:1)
  • AA: or shift the background to #595959 (4.56:1)
  • AAA: or shift the background to #3d3d3d (7.08:1)
Aaon black
13.68:1passpasspassPasses 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 #c9db3d 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 #c9db3d
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 #c9db3d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/c9db3d-b8bea2-4e83df-262d1f-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