Color

#b4f50f

#b4f50f
hex#b4f50f
rgbrgb(180, 245, 15)
hslhsl(77, 92%, 51%)
oklchoklch(0.893 0.227 126.7)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.7504

Colors that go with #b4f50f

Red, Plum and Violet 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 →

#500ff5

#f5c30f · #41f50f

#0fb4f5 · #f50fb4

Split-complementary

Open in tool →

#0f41f5 · #c30ff5

#0ff5c3 · #500ff5 · #f50f41

Contrast

#b4f50f as textRatioAAAA largeAAAFix
Aaon white
1.31:1failfailfail
  • AA: use #5d7f05 as the text (4.66:1)
  • AAA: use #445d04 as the text (7.46:1)
  • AA: or shift the background to #636363 (4.58:1)
  • AAA: or shift the background to #474747 (7.08:1)
Aaon black
16.01:1passpasspassPasses 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 #b4f50f 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 #b4f50f
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 #b4f50f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b4f50f-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