Color

#51ecd2

#51ecd2
hex#51ecd2
rgbrgb(81, 236, 210)
hslhsl(170, 80%, 62%)
oklchoklch(0.856 0.134 179.5)
Closest name: Frozen Boubble (#00eedd)Relative luminance 0.6639

Colors that go with #51ecd2

Charcoal, Taupe and Light Coral 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.

Real palettes that use #51ecd2

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ec516a

#51ec84 · #51b8ec

#d251ec · #ecd251

Split-complementary

Open in tool →

#ec51b8 · #ec8451

#8451ec · #ec516a · #b8ec51

Contrast

#51ecd2 as textRatioAAAA largeAAAFix
Aaon white
1.47:1failfailfail
  • AA: use #0f8571 as the text (4.55:1)
  • AAA: use #0b6052 as the text (7.48:1)
  • AA: or shift the background to #5c5c5c (4.55:1)
  • AAA: or shift the background to #404040 (7.05:1)
Aaon black
14.28:1passpasspassPasses 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 #51ecd2 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 #51ecd2
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 #51ecd2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51ecd2-a2bebd-d459a9-1f292d-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