Color

#9eff66

#9eff66
hex#9eff66
rgbrgb(158, 255, 102)
hslhsl(98, 100%, 70%)
oklchoklch(0.909 0.209 135.8)
Closest name: greenyellow (#adff2f)Relative luminance 0.7975

Colors that go with #9eff66

Violet, Blue and Charcoal 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 →

#c766ff

#ebff66 · #66ff7a

#669eff · #ff669e

Split-complementary

Open in tool →

#7a66ff · #ff66eb

#66ebff · #c766ff · #ff7a66

Contrast

#9eff66 as textRatioAAAA largeAAAFix
Aaon white
1.24:1failfailfail
  • AA: use #318500 as the text (4.68:1)
  • AAA: use #256600 as the text (7.05:1)
  • AA: or shift the background to #666666 (4.63:1)
  • AAA: or shift the background to #4a4a4a (7.15:1)
Aaon black
16.95:1passpasspassPasses 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 #9eff66 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

#9eff66 reads as vivid, light, clean. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #9eff66
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 #9eff66 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/9eff66-a9bea2-644edf-1f2d20-f0f1e9?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