Color

#b5f11e

#b5f11e
hex#b5f11e
rgbrgb(181, 241, 30)
hslhsl(77, 88%, 53%)
oklchoklch(0.885 0.22 126)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.7283

Colors that go with #b5f11e

Blue, Crimson 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 →

#591ef1

#f1c31e · #4bf11e

#1eb5f1 · #f11eb5

Split-complementary

Open in tool →

#1e4bf1 · #c31ef1

#1ef1c3 · #591ef1 · #f11e4b

Contrast

#b5f11e as textRatioAAAA largeAAAFix
Aaon white
1.35:1failfailfail
  • AA: use #5f8108 as the text (4.54:1)
  • AAA: use #466006 as the text (7.15:1)
  • AA: or shift the background to #616161 (4.59:1)
  • AAA: or shift the background to #454545 (7.11:1)
Aaon black
15.57:1passpasspassPasses 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 #b5f11e 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 #b5f11e
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 #b5f11e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b5f11e-b3bea2-4e6bdf-232d1f-f1efe9?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