Color

#667b8a

#667b8a
hex#667b8a
rgbrgb(102, 123, 138)
hslhsl(205, 15%, 47%)
oklchoklch(0.571 0.034 239.3)
Closest name: Citadel (#6a7f8b)Relative luminance 0.1883

Colors that go with #667b8a

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 #667b8a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a7566

#668a87 · #66698a

#8a667b · #7b8a66

Split-complementary

Open in tool →

#8a6669 · #8a8766

#87668a · #8a7566 · #698a66

Contrast

#667b8a as textRatioAAAA largeAAAFix
Aaon white
4.41:1failpassfail
  • AA: use #647887 as the text (4.59:1)
  • AAA: use #4c5b67 as the text (7:1)
  • AA: or shift the background to #080808 (4.54:1)
Aaon black
4.77:1passpassfail
  • AAA: use #8799a6 as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #667b8a 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 #667b8a
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 #667b8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/667b8a-9cafc4-df4e58-1f212d-e9f1f0?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