Color

#81e151

#81e151
hex#81e151
rgbrgb(129, 225, 81)
hslhsl(100, 71%, 60%)
oklchoklch(0.821 0.201 136.8)
Closest name: Herbivore (#88ee77)Relative luminance 0.5911

Colors that go with #81e151

Violet, Charcoal and Dark Orange 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 →

#b151e1

#c9e151 · #51e169

#5181e1 · #e15181

Split-complementary

Open in tool →

#6951e1 · #e151c9

#51c9e1 · #b151e1 · #e16951

Contrast

#81e151 as textRatioAAAA largeAAAFix
Aaon white
1.64:1failfailfail
  • AA: use #3a8316 as the text (4.73:1)
  • AAA: use #2d6411 as the text (7.14:1)
  • AA: or shift the background to #545454 (4.62:1)
  • AAA: or shift the background to #383838 (7.16:1)
Aaon black
12.82:1passpasspassPasses 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 #81e151 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 #81e151
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 #81e151 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/81e151-a8bea2-694edf-1f2d21-f0f1e9?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