Color

#81bdf8

#81bdf8
hex#81bdf8
rgbrgb(129, 189, 248)
hslhsl(210, 89%, 74%)
oklchoklch(0.78 0.105 248.9)
Closest name: Electric Eel (#88bbee)Relative luminance 0.4784

Colors that go with #81bdf8

Charcoal, Goldenrod 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f8bd82

#82f8f8 · #8282f8

#f882bd · #bdf882

Split-complementary

Open in tool →

#f88282 · #f8f882

#f882f8 · #f8bd82 · #82f882

Contrast

#81bdf8 as textRatioAAAA largeAAAFix
Aaon white
1.99:1failfailfail
  • AA: use #0d75de as the text (4.55:1)
  • AAA: use #0a57a4 as the text (7.21:1)
  • AA: or shift the background to #474747 (4.68:1)
  • AAA: or shift the background to #2b2b2b (7.13:1)
Aaon black
10.57:1passpasspassPasses 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 #81bdf8 as the background.

Brands using this color

Fonts for this mood

#81bdf8 reads as cool, vivid, light. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #81bdf8
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 #81bdf8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/81bdf8-9cabc4-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