Color

#81a5ca

#81a5ca
hex#81a5ca
rgbrgb(129, 165, 202)
hslhsl(210, 41%, 65%)
oklchoklch(0.709 0.067 249.5)
Closest name: Birdie Num Num (#89acda)Relative luminance 0.3584

Colors that go with #81a5ca

Charcoal, Peru and Amber 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 #81a5ca

Tints & shades

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

Harmonies

Complementary

Open in tool →

#caa681

#81caca · #8181ca

#ca81a6 · #a6ca81

Split-complementary

Open in tool →

#ca8181 · #caca81

#ca81ca · #caa681 · #81ca81

Contrast

#81a5ca as textRatioAAAA largeAAAFix
Aaon white
2.57:1failfailfail
  • AA: use #487aad as the text (4.5:1)
  • AAA: use #35597e as the text (7.29:1)
  • AA: or shift the background to #383838 (4.56:1)
  • AAA: or shift the background to #141414 (7.17:1)
Aaon black
8.17:1passpasspassPasses 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 #81a5ca 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

#81a5ca reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #81a5ca
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 #81a5ca and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/81a5ca-9cabc4-df514e-1f202d-e9f1f1?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