Color

#b5ff66

#b5ff66
hex#b5ff66
rgbrgb(181, 255, 102)
hslhsl(89, 100%, 70%)
oklchoklch(0.921 0.198 131.1)
Closest name: greenyellow (#adff2f)Relative luminance 0.823

Colors that go with #b5ff66

Violet, Gold and Red 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 →

#b066ff

#fffc66 · #69ff66

#66b5ff · #ff66b5

Split-complementary

Open in tool →

#6669ff · #fc66ff

#66fffc · #b066ff · #ff6669

Contrast

#b5ff66 as textRatioAAAA largeAAAFix
Aaon white
1.2:1failfailfail
  • AA: use #458500 as the text (4.56:1)
  • AAA: use #326100 as the text (7.38:1)
  • AA: or shift the background to #696969 (4.56:1)
  • AAA: or shift the background to #4d4d4d (7.03:1)
Aaon black
17.46:1passpasspassPasses 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 #b5ff66 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

#b5ff66 reads as vivid, light, clean. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b5ff66
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 #b5ff66 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b5ff66-adbea2-4e4edf-212d1f-f1f1e9?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