Color

#66ffde

#66ffde
hex#66ffde
rgbrgb(102, 255, 222)
hslhsl(167, 100%, 70%)
oklchoklch(0.909 0.138 176.2)
Closest name: aquamarine (#7fffd4)Relative luminance 0.7962

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff6687

#66ff91 · #66d4ff

#de66ff · #ffde66

Split-complementary

Open in tool →

#ff66d4 · #ff9166

#9166ff · #ff6687 · #d4ff66

Contrast

#66ffde as textRatioAAAA largeAAAFix
Aaon white
1.24:1failfailfail
  • AA: use #008568 as the text (4.61:1)
  • AAA: use #00614c as the text (7.46:1)
  • AA: or shift the background to #666666 (4.63:1)
  • AAA: or shift the background to #4a4a4a (7.14:1)
Aaon black
16.92:1passpasspassPasses 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 #66ffde 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

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

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

tool url/palettes/new/66ffde-a2bebb-d459af-1f2a2d-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