Color

#66fffa

#66fffa
hex#66fffa
rgbrgb(102, 255, 250)
hslhsl(178, 100%, 70%)
oklchoklch(0.918 0.129 192.1)
Closest name: aqua (#00ffff)Relative luminance 0.8125

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff666b

#66ffad · #66b8ff

#fa66ff · #fffa66

Split-complementary

Open in tool →

#ff66b8 · #ffad66

#ad66ff · #ff666b · #b8ff66

Contrast

#66fffa as textRatioAAAA largeAAAFix
Aaon white
1.22:1failfailfail
  • AA: use #00807b as the text (4.8:1)
  • AAA: use #00615e as the text (7.31:1)
  • AA: or shift the background to #696969 (4.51:1)
  • AAA: or shift the background to #4a4a4a (7.28:1)
Aaon black
17.25:1passpasspassPasses 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 #66fffa 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

#66fffa reads as vivid, light, clean. The font library is tagged with the same vocabulary:

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

tool url/palettes/new/66fffa-a2bcbe-d45999-1f282d-e9f1ed?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