Color

#81d9da

#81d9da
hex#81d9da
rgbrgb(129, 217, 218)
hslhsl(181, 55%, 68%)
oklchoklch(0.831 0.085 196.6)
Closest name: Cold Blue (#88dddd)Relative luminance 0.5935

Colors that go with #81d9da

Charcoal, Dark Salmon and Crimson 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 #81d9da

Tints & shades

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

Harmonies

Complementary

Open in tool →

#da8281

#81daaf · #81acda

#da81d9 · #d9da81

Split-complementary

Open in tool →

#da81ac · #daaf81

#af81da · #da8281 · #acda81

Contrast

#81d9da as textRatioAAAA largeAAAFix
Aaon white
1.63:1failfailfail
  • AA: use #268182 as the text (4.62:1)
  • AAA: use #1d6263 as the text (7.05:1)
  • AA: or shift the background to #545454 (4.64:1)
  • AAA: or shift the background to #383838 (7.19:1)
Aaon black
12.87:1passpasspassPasses 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 #81d9da as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#81d9da reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #81d9da
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 #81d9da and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/81d9da-a2babe-d45992-1f272d-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