Color

#66938f

#66938f
hex#66938f
rgbrgb(102, 147, 143)
hslhsl(175, 18%, 49%)
oklchoklch(0.63 0.049 189)
Closest name: Cavolo Nero (#72939e)Relative luminance 0.2568

Colors that go with #66938f

Charcoal, Copper and Blush Pink 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.

Real palettes that use #66938f

Tints & shades

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

Harmonies

Complementary

Open in tool →

#93666a

#669379 · #668193

#906693 · #939066

Split-complementary

Open in tool →

#936681 · #937966

#796693 · #93666a · #819366

Contrast

#66938f as textRatioAAAA largeAAAFix
Aaon white
3.42:1failpassfail
  • AA: use #567b78 as the text (4.67:1)
  • AAA: use #415d5b as the text (7.14:1)
  • AA: or shift the background to #242424 (4.53:1)
Aaon black
6.14:1passpassfail
  • AAA: use #759f9b as the text (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #66938f 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 #66938f
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 #66938f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66938f-a2bdbe-d4599f-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