Color

#b5cd18

#b5cd18
hex#b5cd18
rgbrgb(181, 205, 24)
hslhsl(68, 79%, 45%)
oklchoklch(0.803 0.182 118)
Closest name: yellowgreen (#9acd32)Relative luminance 0.5355

Colors that go with #b5cd18

Cornflower Blue, Deep Sky 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 →

#3018cd

#cd8b18 · #5bcd18

#18b5cd · #cd18b5

Split-complementary

Open in tool →

#185bcd · #8b18cd

#18cd8b · #3018cd · #cd185b

Contrast

#b5cd18 as textRatioAAAA largeAAAFix
Aaon white
1.79:1failfailfail
  • AA: use #6d7b0e as the text (4.68:1)
  • AAA: use #515b0b as the text (7.37:1)
  • AA: or shift the background to #4f4f4f (4.57:1)
  • AAA: or shift the background to #333333 (7.05:1)
Aaon black
11.71:1passpasspassPasses 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 #b5cd18 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 #b5cd18
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 #b5cd18 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b5cd18-b7bea2-4e81df-252d1f-f1eee9?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