brandsweets

Color

#f4ff57

#f4ff57
hex#f4ff57
rgbrgb(244, 255, 87)
hslhsl(64, 100%, 67%)
oklchoklch(0.962 0.184 113)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.9144
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
f4ff576257ff

#6257ff

Analogous

Open in tool →
f4ff57ffb657a0ff57

#ffb657 · #a0ff57

Triadic

Open in tool →
f4ff5757f4ffff57f4

#57f4ff · #ff57f4

Split-complementary

Open in tool →
f4ff5757a0ffb657ff

#57a0ff · #b657ff

Tetradic

Open in tool →
f4ff5757ffb66257ffff57a0

#57ffb6 · #6257ff · #ff57a0

Contrast

#f4ff57 as textRatioAAAA largeAAAFix
Aaon white
1.09:1failfailfail
  • AA: use #727a00 as the text (4.67:1)
  • AAA: use #565c00 as the text (7.18:1)
  • AA: or shift the background to #707070 (4.55:1)
  • AAA: or shift the background to #525252 (7.18:1)
Aaon black
19.29:1passpasspassPasses 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 #f4ff57 as the background.

Brands using this color

mcpConnect your agent — build around #f4ff57
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

›analyze #f4ff57 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f4ff57-b9bea2-4e8adf-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