Color

#b5fb3c

#b5fb3c
hex#b5fb3c
rgbrgb(181, 251, 60)
hslhsl(82, 96%, 61%)
oklchoklch(0.909 0.22 128.3)
Closest name: greenyellow (#adff2f)Relative luminance 0.7914

Colors that go with #b5fb3c

Violet, Red and 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 →

#823cfb

#fbe23c · #56fb3c

#3cb5fb · #fb3cb5

Split-complementary

Open in tool →

#3c56fb · #e23cfb

#3cfbe2 · #823cfb · #fb3c56

Contrast

#b5fb3c as textRatioAAAA largeAAAFix
Aaon white
1.25:1failfailfail
  • AA: use #538203 as the text (4.6:1)
  • AAA: use #3d5f02 as the text (7.4:1)
  • AA: or shift the background to #666666 (4.6:1)
  • AAA: or shift the background to #4a4a4a (7.1:1)
Aaon black
16.83:1passpasspassPasses 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 #b5fb3c 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 #b5fb3c
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 #b5fb3c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b5fb3c-b0bea2-4e5fdf-222d1f-f1f0e9?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