Color

#18a550

#18a550
hex#18a550
rgbrgb(24, 165, 80)
hslhsl(144, 75%, 37%)
oklchoklch(0.634 0.167 150.3)
Closest name: Fennel Fiasco (#00aa44)Relative luminance 0.2768

Colors that go with #18a550

Charcoal, Blue and Crimson 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 →

#a5186d

#26a518 · #18a597

#5018a5 · #a55018

Split-complementary

Open in tool →

#9718a5 · #a51826

#1826a5 · #a5186d · #a59718

Contrast

#18a550 as textRatioAAAA largeAAAFix
Aaon white
3.21:1failpassfail
  • AA: use #138641 as the text (4.65:1)
  • AAA: use #0e6230 as the text (7.48:1)
  • AA: or shift the background to #292929 (4.53:1)
Aaon black
6.54:1passpassfail
  • AAA: use #19ae55 as the text (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #18a550 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #18a550
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 #18a550 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/18a550-a2beb0-ca59d4-1f2d2b-eaf1e9?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