Color

#ffe45c

#ffe45c
hex#ffe45c
rgbrgb(255, 228, 92)
hslhsl(50, 100%, 68%)
oklchoklch(0.917 0.155 98)
Closest name: Mustard Yellow (#ffdb58)Relative luminance 0.7752

Colors that go with #ffe45c

Charcoal, Cornflower Blue and 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c77ff

#ff925c · #c9ff5c

#5cffe4 · #e45cff

Split-complementary

Open in tool →

#5cc9ff · #925cff

#5cff92 · #5c77ff · #ff5cc9

Contrast

#ffe45c as textRatioAAAA largeAAAFix
Aaon white
1.27:1failfailfail
  • AA: use #8a7300 as the text (4.63:1)
  • AAA: use #665500 as the text (7.33:1)
  • AA: or shift the background to #666666 (4.51:1)
  • AAA: or shift the background to #474747 (7.3:1)
Aaon black
16.5:1passpasspassPasses 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 #ffe45c as the background.

Brands using this color

Fonts for this mood

#ffe45c reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ffe45c
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 #ffe45c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ffe45c-c4c29c-4eacdf-292d1f-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