Color

#efd543

#efd543
hex#efd543
rgbrgb(239, 213, 67)
hslhsl(51, 84%, 60%)
oklchoklch(0.87 0.16 98.8)
Closest name: Banana Drama (#f1d548)Relative luminance 0.6634

Colors that go with #efd543

Charcoal, Crimson and Deep Sky 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 →

#435def

#ef7f43 · #b3ef43

#43efd5 · #d543ef

Split-complementary

Open in tool →

#43b3ef · #7f43ef

#43ef7f · #435def · #ef43b3

Contrast

#efd543 as textRatioAAAA largeAAAFix
Aaon white
1.47:1failfailfail
  • AA: use #88750c as the text (4.57:1)
  • AAA: use #635509 as the text (7.41:1)
  • AA: or shift the background to #5c5c5c (4.54:1)
  • AAA: or shift the background to #404040 (7.05:1)
Aaon black
14.27:1passpasspassPasses 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 #efd543 as the background.

Brands using this color

Fonts for this mood

#efd543 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #efd543
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 #efd543 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/efd543-c4c29c-4eaadf-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