Color

#11d5ee

#11d5ee
hex#11d5ee
rgbrgb(17, 213, 238)
hslhsl(187, 87%, 50%)
oklchoklch(0.8 0.137 209.9)
Closest name: darkturquoise (#00ced1)Relative luminance 0.5388

Colors that go with #11d5ee

Charcoal, Crimson and Dodger Blue 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 →

#ee2a11

#11ee99 · #1166ee

#ee11d5 · #d5ee11

Split-complementary

Open in tool →

#ee1166 · #ee9911

#9911ee · #ee2a11 · #66ee11

Contrast

#11d5ee as textRatioAAAA largeAAAFix
Aaon white
1.78:1failfailfail
  • AA: use #0a808f as the text (4.67:1)
  • AAA: use #08626e as the text (7.04:1)
  • AA: or shift the background to #4f4f4f (4.59:1)
  • AAA: or shift the background to #333333 (7.09:1)
Aaon black
11.78:1passpasspassPasses 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 #11d5ee as the background.

Brands using this color

Fonts for this mood

#11d5ee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #11d5ee
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 #11d5ee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/11d5ee-a2b8be-df4e83-1f262d-e9f1ee?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