Color

#fbd55b

#fbd55b
hex#fbd55b
rgbrgb(251, 213, 91)
hslhsl(46, 95%, 67%)
oklchoklch(0.883 0.145 91.8)
Closest name: Mustard Yellow (#ffdb58)Relative luminance 0.6885

Colors that go with #fbd55b

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.

Real palettes that use #fbd55b

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#5b80fb

#fb865b · #d0fb5b

#5bfbd5 · #d55bfb

Split-complementary

Open in tool →

#5bd0fb · #865bfb

#5bfb86 · #5b80fb · #fb5bd0

Contrast

#fbd55b as textRatioAAAA largeAAAFix
Aaon white
1.42:1failfailfail
  • AA: use #906f04 as the text (4.71:1)
  • AAA: use #6d5503 as the text (7.12:1)
  • AA: or shift the background to #5e5e5e (4.56:1)
  • AAA: or shift the background to #424242 (7.07:1)
Aaon black
14.77:1passpasspassPasses 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 #fbd55b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#fbd55b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #fbd55b
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 #fbd55b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fbd55b-c4bf9c-62adcb-2a2d1f-f1ece9?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