Color

#eff66a

#eff66a
hex#eff66a
rgbrgb(239, 246, 106)
hslhsl(63, 89%, 69%)
oklchoklch(0.941 0.162 111.8)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.853

Colors that go with #eff66a

Lilac, Charcoal and Crimson 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 →

#716af6

#f6b76a · #a9f66a

#6aeff6 · #f66aef

Split-complementary

Open in tool →

#6aa9f6 · #b76af6

#6af6b7 · #716af6 · #f66aa9

Contrast

#eff66a as textRatioAAAA largeAAAFix
Aaon white
1.16:1failfailfail
  • AA: use #737807 as the text (4.75:1)
  • AAA: use #575c05 as the text (7.15:1)
  • AA: or shift the background to #6b6b6b (4.58:1)
  • AAA: or shift the background to #4f4f4f (7.04:1)
Aaon black
18.06:1passpasspassPasses 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 #eff66a as the background.

Brands using this color

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

mcpConnect your agent — build around #eff66a
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 #eff66a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff66a-b9bea2-4e8ddf-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