Color

#51d2ce

#51d2ce
hex#51d2ce
rgbrgb(81, 210, 206)
hslhsl(178, 59%, 57%)
oklchoklch(0.792 0.112 192.2)
Closest name: mediumturquoise (#48d1cc)Relative luminance 0.523

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d25155

#51d28d · #5196d2

#ce51d2 · #d2ce51

Split-complementary

Open in tool →

#d25196 · #d28d51

#8d51d2 · #d25155 · #96d251

Contrast

#51d2ce as textRatioAAAA largeAAAFix
Aaon white
1.83:1failfailfail
  • AA: use #21827f as the text (4.6:1)
  • AAA: use #19615f as the text (7.2:1)
  • AA: or shift the background to #4d4d4d (4.61:1)
  • AAA: or shift the background to #303030 (7.2:1)
Aaon black
11.46:1passpasspassPasses 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 #51d2ce 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 #51d2ce
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 #51d2ce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51d2ce-a2bcbe-d45999-1f282d-e9f1ed?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