Color

#12a559

#12a559
hex#12a559
rgbrgb(18, 165, 89)
hslhsl(149, 80%, 36%)
oklchoklch(0.634 0.16 152.9)
Closest name: Jade (#00a86b)Relative luminance 0.2776

Colors that go with #12a559

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 →

#a5125e

#15a512 · #12a5a3

#5912a5 · #a55912

Split-complementary

Open in tool →

#a312a5 · #a51215

#1215a5 · #a5125e · #a5a312

Contrast

#12a559 as textRatioAAAA largeAAAFix
Aaon white
3.21:1failpassfail
  • AA: use #0f8548 as the text (4.7:1)
  • AAA: use #0b6537 as the text (7.17:1)
  • AA: or shift the background to #292929 (4.54:1)
Aaon black
6.55:1passpassfail
  • AAA: use #13ae5e as the text (7.24:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #12a559 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #12a559
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 #12a559 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/12a559-a2beb3-d459d4-1f2d2c-e9f1e9?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