Color

#51cdc8

#51cdc8
hex#51cdc8
rgbrgb(81, 205, 200)
hslhsl(178, 55%, 56%)
oklchoklch(0.778 0.109 191.4)
Closest name: mediumturquoise (#48d1cc)Relative luminance 0.4958

Colors that go with #51cdc8

Charcoal, Slate Gray and Taupe 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 #51cdc8

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cd5155

#51cd8b · #5193cd

#c851cd · #cdc851

Split-complementary

Open in tool →

#cd5193 · #cd8b51

#8b51cd · #cd5155 · #93cd51

Contrast

#51cdc8 as textRatioAAAA largeAAAFix
Aaon white
1.92:1failfailfail
  • AA: use #26827f as the text (4.58:1)
  • AAA: use #1c5f5d as the text (7.38:1)
  • AA: or shift the background to #4a4a4a (4.61:1)
  • AAA: or shift the background to #2e2e2e (7.06:1)
Aaon black
10.92:1passpasspassPasses 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 #51cdc8 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 #51cdc8
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 #51cdc8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51cdc8-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