Color

#66e5ce

#66e5ce
hex#66e5ce
rgbrgb(102, 229, 206)
hslhsl(169, 71%, 65%)
oklchoklch(0.844 0.118 179.6)
Closest name: turquoise (#40e0d0)Relative luminance 0.6332

Colors that go with #66e5ce

Charcoal, Deep Sky Blue and Taupe 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e5667e

#66e58f · #66bde5

#ce66e5 · #e5ce66

Split-complementary

Open in tool →

#e566bd · #e58f66

#8f66e5 · #e5667e · #bde566

Contrast

#66e5ce as textRatioAAAA largeAAAFix
Aaon white
1.54:1failfailfail
  • AA: use #16836f as the text (4.66:1)
  • AAA: use #116455 as the text (7.05:1)
  • AA: or shift the background to #595959 (4.56:1)
  • AAA: or shift the background to #3d3d3d (7.07:1)
Aaon black
13.66:1passpasspassPasses 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 #66e5ce as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #66e5ce
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 #66e5ce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66e5ce-a2bebc-d459ab-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