Color

#12f866

#12f866
hex#12f866
rgbrgb(18, 248, 102)
hslhsl(142, 94%, 52%)
oklchoklch(0.855 0.246 147.8)
Closest name: Cathode Green (#00ff55)Relative luminance 0.6822

Colors that go with #12f866

Violet, Deep Sky Blue and Hot Pink 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 →

#f812a3

#30f812 · #12f8d9

#6612f8 · #f86612

Split-complementary

Open in tool →

#d912f8 · #f81230

#1230f8 · #f812a3 · #f8d912

Contrast

#12f866 as textRatioAAAA largeAAAFix
Aaon white
1.43:1failfailfail
  • AA: use #048634 as the text (4.7:1)
  • AAA: use #036326 as the text (7.46:1)
  • AA: or shift the background to #5e5e5e (4.52:1)
  • AAA: or shift the background to #424242 (7.01:1)
Aaon black
14.64:1passpasspassPasses 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 #12f866 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 #12f866
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 #12f866 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/12f866-a2beaf-c659d4-1f2d2a-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