Color

#15cb4f

#15cb4f
hex#15cb4f
rgbrgb(21, 203, 79)
hslhsl(139, 81%, 44%)
oklchoklch(0.735 0.213 147.2)
Closest name: Alienated (#00cc55)Relative luminance 0.4344

Colors that go with #15cb4f

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 →

#cb1592

#37cb15 · #15cbaa

#4f15cb · #cb4f15

Split-complementary

Open in tool →

#aa15cb · #cb1537

#1537cb · #cb1592 · #cbaa15

Contrast

#15cb4f as textRatioAAAA largeAAAFix
Aaon white
2.17:1failfailfail
  • AA: use #0e8634 as the text (4.69:1)
  • AAA: use #0b6627 as the text (7.13:1)
  • AA: or shift the background to #424242 (4.64:1)
  • AAA: or shift the background to #242424 (7.16:1)
Aaon black
9.69:1passpasspassPasses 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 #15cb4f as the background.

Brands using this color

mcpConnect your agent — build around #15cb4f
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 #15cb4f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15cb4f-a2beae-c059d4-1f2d2a-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