Color

#66e1bc

#66e1bc
hex#66e1bc
rgbrgb(102, 225, 188)
hslhsl(162, 67%, 64%)
oklchoklch(0.829 0.123 170.8)
Closest name: Aphrodite Aqua (#45e9c1)Relative luminance 0.6031

Colors that go with #66e1bc

Charcoal, Crimson and Deep Sky Blue 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 →

#e1668b

#66e17e · #66c8e1

#bc66e1 · #e1bc66

Split-complementary

Open in tool →

#e166c8 · #e17e66

#7e66e1 · #e1668b · #c8e166

Contrast

#66e1bc as textRatioAAAA largeAAAFix
Aaon white
1.61:1failfailfail
  • AA: use #1a8464 as the text (4.64:1)
  • AAA: use #13624a as the text (7.31:1)
  • AA: or shift the background to #545454 (4.71:1)
  • AAA: or shift the background to #383838 (7.29:1)
Aaon black
13.06:1passpasspassPasses 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 #66e1bc 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 #66e1bc
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 #66e1bc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66e1bc-a2beb9-d459b9-1f2b2d-e9f1eb?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