Color

#51e53e

#51e53e
hex#51e53e
rgbrgb(81, 229, 62)
hslhsl(113, 76%, 57%)
oklchoklch(0.812 0.239 141.5)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5814

Colors that go with #51e53e

Deep Sky Blue, Taupe and Violet 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 →

#d13ee5

#a5e53e · #3ee57e

#3e51e5 · #e53e51

Split-complementary

Open in tool →

#7e3ee5 · #e53ea5

#3ea5e5 · #d13ee5 · #e57e3e

Contrast

#51e53e as textRatioAAAA largeAAAFix
Aaon white
1.66:1failfailfail
  • AA: use #208712 as the text (4.63:1)
  • AAA: use #18670e as the text (7.03:1)
  • AA: or shift the background to #545454 (4.55:1)
  • AAA: or shift the background to #383838 (7.05:1)
Aaon black
12.63:1passpasspassPasses 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 #51e53e 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 #51e53e
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 #51e53e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51e53e-a2bea2-884edf-1f2d24-eef1e9?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