Color

#66ebe4

#66ebe4
hex#66ebe4
rgbrgb(102, 235, 228)
hslhsl(177, 77%, 66%)
oklchoklch(0.865 0.117 190.5)
Closest name: Bath Water (#88eeee)Relative luminance 0.6784

Colors that go with #66ebe4

Charcoal, Deep Sky Blue and Light Coral 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 →

#eb666c

#66eba2 · #66afeb

#e466eb · #ebe466

Split-complementary

Open in tool →

#eb66af · #eba266

#a266eb · #eb666c · #afeb66

Contrast

#66ebe4 as textRatioAAAA largeAAAFix
Aaon white
1.44:1failfailfail
  • AA: use #11837d as the text (4.6:1)
  • AAA: use #0d635f as the text (7.08:1)
  • AA: or shift the background to #5c5c5c (4.64:1)
  • AAA: or shift the background to #404040 (7.19:1)
Aaon black
14.57:1passpasspassPasses 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 #66ebe4 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 #66ebe4
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 #66ebe4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66ebe4-a2bcbe-d4599b-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