Color

#12af78

#12af78
hex#12af78
rgbrgb(18, 175, 120)
hslhsl(159, 81%, 38%)
oklchoklch(0.668 0.144 161.6)
Closest name: Cosmic Green (#30a877)Relative luminance 0.3214

Colors that go with #12af78

Charcoal, Blue and Cornflower 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 →

#af1249

#12af2a · #1298af

#7812af · #af7812

Split-complementary

Open in tool →

#af1298 · #af2a12

#2a12af · #af1249 · #98af12

Contrast

#12af78 as textRatioAAAA largeAAAFix
Aaon white
2.83:1failfailfail
  • AA: use #0e865c as the text (4.58:1)
  • AAA: use #0a6143 as the text (7.49:1)
  • AA: or shift the background to #303030 (4.67:1)
  • AAA: or shift the background to #0a0a0a (7:1)
Aaon black
7.43:1passpasspassPasses 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 #12af78 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #12af78
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 #12af78 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/12af78-a2beb8-d459c0-1f2c2d-e9f1eb?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