Color

#668cb7

#668cb7
hex#668cb7
rgbrgb(102, 140, 183)
hslhsl(212, 36%, 56%)
oklchoklch(0.629 0.078 252.1)
Closest name: Galactic Gossamer (#7f8cb8)Relative luminance 0.25

Colors that go with #668cb7

Charcoal, Copper and Amber 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 →

#b79166

#66b4b7 · #6966b7

#b7668c · #8cb766

Split-complementary

Open in tool →

#b76966 · #b4b766

#b766b4 · #b79166 · #66b769

Contrast

#668cb7 as textRatioAAAA largeAAAFix
Aaon white
3.5:1failpassfail
  • AA: use #4e77a6 as the text (4.65:1)
  • AAA: use #3b5a7d as the text (7.13:1)
  • AA: or shift the background to #212121 (4.6:1)
Aaon black
6:1passpassfail
  • AAA: use #7899bf as the text (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #668cb7 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#668cb7 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #668cb7
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 #668cb7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/668cb7-9caac4-df564e-1f202d-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