Color

#15cb43

#15cb43
hex#15cb43
rgbrgb(21, 203, 67)
hslhsl(135, 81%, 44%)
oklchoklch(0.734 0.222 145.7)
Closest name: Alienated (#00cc55)Relative luminance 0.4328

Colors that go with #15cb43

Blue, Charcoal and Royal 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 →

#cb159e

#43cb15 · #15cb9e

#4315cb · #cb4315

Split-complementary

Open in tool →

#9e15cb · #cb1543

#1543cb · #cb159e · #cb9e15

Contrast

#15cb43 as textRatioAAAA largeAAAFix
Aaon white
2.17:1failfailfail
  • AA: use #0e862c as the text (4.7:1)
  • AAA: use #0b6621 as the text (7.15:1)
  • AA: or shift the background to #424242 (4.62:1)
  • AAA: or shift the background to #242424 (7.14:1)
Aaon black
9.66:1passpasspassPasses 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 #15cb43 as the background.

Brands using this color

mcpConnect your agent — build around #15cb43
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 #15cb43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15cb43-a2beac-b759d4-1f2d29-ebf1e9?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