Color

#66e6fa

#66e6fa
hex#66e6fa
rgbrgb(102, 230, 250)
hslhsl(188, 94%, 69%)
oklchoklch(0.861 0.116 209.2)
Closest name: Aqua (#0ff0fe)Relative luminance 0.6632

Colors that go with #66e6fa

Charcoal, Deep Sky Blue 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 #66e6fa

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fa7966

#66fac4 · #669cfa

#fa66e6 · #e6fa66

Split-complementary

Open in tool →

#fa669c · #fac466

#c466fa · #fa7966 · #9cfa66

Contrast

#66e6fa as textRatioAAAA largeAAAFix
Aaon white
1.47:1failfailfail
  • AA: use #058194 as the text (4.59:1)
  • AAA: use #035f6d as the text (7.34:1)
  • AA: or shift the background to #5c5c5c (4.54:1)
  • AAA: or shift the background to #404040 (7.04:1)
Aaon black
14.26:1passpasspassPasses 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 #66e6fa 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

#66e6fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #66e6fa
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 #66e6fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66e6fa-a2b7be-df4e81-1f252d-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