Color

#f1ff57

#f1ff57
hex#f1ff57
rgbrgb(241, 255, 87)
hslhsl(65, 100%, 67%)
oklchoklch(0.96 0.185 114)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.9091

Colors that go with #f1ff57

Blue, Crimson and Taupe 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 →

#6557ff

#ffb957 · #9dff57

#57f1ff · #ff57f1

Split-complementary

Open in tool →

#579dff · #b957ff

#57ffb9 · #6557ff · #ff579d

Contrast

#f1ff57 as textRatioAAAA largeAAAFix
Aaon white
1.09:1failfailfail
  • AA: use #707a00 as the text (4.7:1)
  • AAA: use #545c00 as the text (7.22:1)
  • AA: or shift the background to #707070 (4.52:1)
  • AAA: or shift the background to #525252 (7.14:1)
Aaon black
19.18:1passpasspassPasses 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 #f1ff57 as the background.

Brands using this color

mcpConnect your agent — build around #f1ff57
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 #f1ff57 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f1ff57-b8bea2-4e88df-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