Color

#51a475

#51a475
hex#51a475
rgbrgb(81, 164, 117)
hslhsl(146, 34%, 48%)
oklchoklch(0.654 0.108 156.8)
Closest name: Cosmic Green (#30a877)Relative luminance 0.2958

Colors that go with #51a475

Charcoal, Blue and Copper 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 →

#a45180

#56a451 · #51a49e

#7551a4 · #a47551

Split-complementary

Open in tool →

#9e51a4 · #a45156

#5156a4 · #a45180 · #a49e51

Contrast

#51a475 as textRatioAAAA largeAAAFix
Aaon white
3.04:1failpassfail
  • AA: use #40825d as the text (4.6:1)
  • AAA: use #2f6044 as the text (7.3:1)
  • AA: or shift the background to #2b2b2b (4.66:1)
Aaon black
6.92:1passpassfail
  • AAA: use #52a777 as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51a475 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 #51a475
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 #51a475 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51a475-a2beb1-ce59d4-1f2d2b-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