Color

#66e1fa

#66e1fa
hex#66e1fa
rgbrgb(102, 225, 250)
hslhsl(190, 94%, 69%)
oklchoklch(0.849 0.114 213.1)
Closest name: Cold Blue (#88dddd)Relative luminance 0.6358

Colors that go with #66e1fa

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 #66e1fa

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fa7e66

#66fac9 · #6697fa

#fa66e1 · #e1fa66

Split-complementary

Open in tool →

#fa6697 · #fac966

#c966fa · #fa7e66 · #97fa66

Contrast

#66e1fa as textRatioAAAA largeAAAFix
Aaon white
1.53:1failfailfail
  • AA: use #058199 as the text (4.56:1)
  • AAA: use #045f72 as the text (7.28:1)
  • AA: or shift the background to #595959 (4.57:1)
  • AAA: or shift the background to #3d3d3d (7.09:1)
Aaon black
13.72:1passpasspassPasses 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 #66e1fa 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

#66e1fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #66e1fa
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 #66e1fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66e1fa-a2b6be-df4e7c-1f252d-e9f1ef?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