Color

#2aef51

#2aef51
hex#2aef51
rgbrgb(42, 239, 81)
hslhsl(132, 86%, 55%)
oklchoklch(0.832 0.248 145.3)
Closest name: Becquerel (#4bec13)Relative luminance 0.6282

Colors that go with #2aef51

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 →

#ef2ac7

#65ef2a · #2aefb4

#512aef · #ef512a

Split-complementary

Open in tool →

#b42aef · #ef2a65

#2a65ef · #ef2ac7 · #efb42a

Contrast

#2aef51 as textRatioAAAA largeAAAFix
Aaon white
1.55:1failfailfail
  • AA: use #0a8523 as the text (4.78:1)
  • AAA: use #07641a as the text (7.38:1)
  • AA: or shift the background to #595959 (4.52:1)
  • AAA: or shift the background to #3d3d3d (7.02:1)
Aaon black
13.56:1passpasspassPasses 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 #2aef51 as the background.

Brands using this color

mcpConnect your agent — build around #2aef51
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 #2aef51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2aef51-a2beab-b64edf-1f2d28-ecf1e9?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