Color

#fdf03f

#fdf03f
hex#fdf03f
rgbrgb(253, 240, 63)
hslhsl(56, 98%, 62%)
oklchoklch(0.937 0.183 105)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.8356

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f4cfd

#fd913f · #abfd3f

#3ffdf0 · #f03ffd

Split-complementary

Open in tool →

#3fabfd · #913ffd

#3ffd91 · #3f4cfd · #fd3fab

Contrast

#fdf03f as textRatioAAAA largeAAAFix
Aaon white
1.19:1failfailfail
  • AA: use #7e7601 as the text (4.69:1)
  • AAA: use #605a01 as the text (7.09:1)
  • AA: or shift the background to #696969 (4.63:1)
  • AAA: or shift the background to #4d4d4d (7.13:1)
Aaon black
17.71:1passpasspassPasses 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 #fdf03f as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#fdf03f reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #fdf03f
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 #fdf03f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fdf03f-bdbea2-4e9edf-282d1f-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