Color

#66ffed

#66ffed
hex#66ffed
rgbrgb(102, 255, 237)
hslhsl(173, 100%, 70%)
oklchoklch(0.914 0.132 184.4)
Closest name: aqua (#00ffff)Relative luminance 0.8046

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff6678

#66ffa1 · #66c4ff

#ed66ff · #ffed66

Split-complementary

Open in tool →

#ff66c4 · #ffa166

#a166ff · #ff6678 · #c4ff66

Contrast

#66ffed as textRatioAAAA largeAAAFix
Aaon white
1.23:1failfailfail
  • AA: use #008575 as the text (4.55:1)
  • AAA: use #006156 as the text (7.38:1)
  • AA: or shift the background to #666666 (4.67:1)
  • AAA: or shift the background to #4a4a4a (7.21:1)
Aaon black
17.09:1passpasspassPasses 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 #66ffed 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

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

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

tool url/palettes/new/66ffed-a2bebe-d459a3-1f292d-e9f1ec?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