Color

#66e4fa

#66e4fa
hex#66e4fa
rgbrgb(102, 228, 250)
hslhsl(189, 94%, 69%)
oklchoklch(0.856 0.115 210.7)
Closest name: Aqua (#0ff0fe)Relative luminance 0.6521

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fa7c66

#66fac6 · #669afa

#fa66e4 · #e4fa66

Split-complementary

Open in tool →

#fa669a · #fac666

#c666fa · #fa7c66 · #9afa66

Contrast

#66e4fa as textRatioAAAA largeAAAFix
Aaon white
1.5:1failfailfail
  • AA: use #057f94 as the text (4.7:1)
  • AAA: use #046172 as the text (7.1:1)
  • AA: or shift the background to #595959 (4.68:1)
  • AAA: or shift the background to #3d3d3d (7.26:1)
Aaon black
14.04:1passpasspassPasses 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 #66e4fa 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

#66e4fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #66e4fa
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 #66e4fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66e4fa-a2b7be-df4e7e-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