Color

#18a549

#18a549
hex#18a549
rgbrgb(24, 165, 73)
hslhsl(141, 75%, 37%)
oklchoklch(0.633 0.173 148.7)
Closest name: Fennel Fiasco (#00aa44)Relative luminance 0.2759

Colors that go with #18a549

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 →

#a51874

#2da518 · #18a590

#4918a5 · #a54918

Split-complementary

Open in tool →

#9018a5 · #a5182d

#182da5 · #a51874 · #a59018

Contrast

#18a549 as textRatioAAAA largeAAAFix
Aaon white
3.22:1failpassfail
  • AA: use #13863b as the text (4.67:1)
  • AAA: use #0f672d as the text (7:1)
  • AA: or shift the background to #292929 (4.51:1)
Aaon black
6.52:1passpassfail
  • AAA: use #19ae4d as the text (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #18a549 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #18a549
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 #18a549 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/18a549-a2beaf-c459d4-1f2d2a-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