Color

#668f8b

#668f8b
hex#668f8b
rgbrgb(102, 143, 139)
hslhsl(174, 17%, 48%)
oklchoklch(0.619 0.046 188.5)
Closest name: Arctic (#648589)Relative luminance 0.2433

Colors that go with #668f8b

Charcoal, Copper and Burlywood 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 #668f8b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8f666a

#668f76 · #667f8f

#8b668f · #8f8b66

Split-complementary

Open in tool →

#8f667f · #8f7666

#76668f · #8f666a · #7f8f66

Contrast

#668f8b as textRatioAAAA largeAAAFix
Aaon white
3.58:1failpassfail
  • AA: use #597d7a as the text (4.53:1)
  • AAA: use #425c5a as the text (7.22:1)
  • AA: or shift the background to #1f1f1f (4.6:1)
Aaon black
5.87:1passpassfail
  • AAA: use #769e9a as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #668f8b 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 #668f8b
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 #668f8b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/668f8b-a2bebe-d459a1-1f292d-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