Color

#efb42a

#efb42a
hex#efb42a
rgbrgb(239, 180, 42)
hslhsl(42, 86%, 55%)
oklchoklch(0.803 0.155 82.9)
Closest name: Baklava (#efb435)Relative luminance 0.5116

Colors that go with #efb42a

Charcoal, Cornflower Blue 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.

Real palettes that use #efb42a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2a65ef

#ef512a · #c7ef2a

#2aefb4 · #b42aef

Split-complementary

Open in tool →

#2ac7ef · #512aef

#2aef51 · #2a65ef · #ef2ac7

Contrast

#efb42a as textRatioAAAA largeAAAFix
Aaon white
1.87:1failfailfail
  • AA: use #986e0b as the text (4.59:1)
  • AAA: use #725209 as the text (7.18:1)
  • AA: or shift the background to #4d4d4d (4.52:1)
  • AAA: or shift the background to #303030 (7.06:1)
Aaon black
11.23:1passpasspassPasses 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 #efb42a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#efb42a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #efb42a
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 #efb42a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/efb42a-c4bc9c-62b4cb-2b2d1f-f1ebe9?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