Color

#81aeef

#81aeef
hex#81aeef
rgbrgb(129, 174, 239)
hslhsl(215, 77%, 72%)
oklchoklch(0.744 0.106 257.5)
Closest name: Fennel Flower (#77aaff)Relative luminance 0.4117

Tints & shades

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

Harmonies

Complementary

Open in tool →

#efc181

#81e5ef · #8a81ef

#ef81ae · #aeef81

Split-complementary

Open in tool →

#ef8a81 · #e5ef81

#ef81e5 · #efc181 · #81ef8a

Contrast

#81aeef as textRatioAAAA largeAAAFix
Aaon white
2.27:1failfailfail
  • AA: use #2272e2 as the text (4.59:1)
  • AAA: use #1654ac as the text (7.25:1)
  • AA: or shift the background to #404040 (4.56:1)
  • AAA: or shift the background to #212121 (7.08:1)
Aaon black
9.23:1passpasspassPasses 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 #81aeef as the background.

Brands using this color

Fonts for this mood

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

mcpConnect your agent — build around #81aeef
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #81aeef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/81aeef-9ca8c4-df5d4e-201f2d-e9f0f1?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