Color

#fbfb3c

#fbfb3c
hex#fbfb3c
rgbrgb(251, 251, 60)
hslhsl(60, 96%, 61%)
oklchoklch(0.958 0.194 109.6)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.8983

Colors that go with #fbfb3c

Lilac, Blue and Charcoal 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 →

#3c3cfb

#fb9c3c · #9cfb3c

#3cfbfb · #fb3cfb

Split-complementary

Open in tool →

#3c9cfb · #9c3cfb

#3cfb9c · #3c3cfb · #fb3c9c

Contrast

#fbfb3c as textRatioAAAA largeAAAFix
Aaon white
1.11:1failfailfail
  • AA: use #787802 as the text (4.68:1)
  • AAA: use #5a5a02 as the text (7.25:1)
  • AA: or shift the background to #6e6e6e (4.61:1)
  • AAA: or shift the background to #525252 (7.06:1)
Aaon black
18.97:1passpasspassPasses 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 #fbfb3c as the background.

Brands using this color

mcpConnect your agent — build around #fbfb3c
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 #fbfb3c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fbfb3c-bbbea2-4e94df-272d1f-f1ede9?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