Color

#667c8f

#667c8f
hex#667c8f
rgbrgb(102, 124, 143)
hslhsl(208, 17%, 48%)
oklchoklch(0.576 0.039 244.6)
Closest name: Citadel (#6a7f8b)Relative luminance 0.1922

Colors that go with #667c8f

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 #667c8f

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8f7966

#668f8e · #66678f

#8f667c · #7c8f66

Split-complementary

Open in tool →

#8f6667 · #8f8e66

#8e668f · #8f7966 · #678f66

Contrast

#667c8f as textRatioAAAA largeAAAFix
Aaon white
4.33:1failpassfail
  • AA: use #63798c as the text (4.52:1)
  • AAA: use #4a5a68 as the text (7.11:1)
  • AA: or shift the background to #0a0a0a (4.57:1)
Aaon black
4.84:1passpassfail
  • AAA: use #8598a8 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #667c8f 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 #667c8f
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 #667c8f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/667c8f-9cadc4-df4e51-1f212d-e9f1f1?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