Color

#51d2ba

#51d2ba
hex#51d2ba
rgbrgb(81, 210, 186)
hslhsl(169, 59%, 57%)
oklchoklch(0.786 0.118 178.5)
Closest name: mediumaquamarine (#66cdaa)Relative luminance 0.5139

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#d25168

#51d27a · #51a9d2

#ba51d2 · #d2ba51

Split-complementary

Open in tool →

#d251a9 · #d27a51

#7a51d2 · #d25168 · #a9d251

Contrast

#51d2ba as textRatioAAAA largeAAAFix
Aaon white
1.86:1failfailfail
  • AA: use #218270 as the text (4.68:1)
  • AAA: use #196154 as the text (7.29:1)
  • AA: or shift the background to #4d4d4d (4.54:1)
  • AAA: or shift the background to #303030 (7.09:1)
Aaon black
11.28:1passpasspassPasses 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 #51d2ba 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 #51d2ba
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #51d2ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51d2ba-a2bebc-d459ab-1f2a2d-e9f1ec?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