Color

#669fb7

#669fb7
hex#669fb7
rgbrgb(102, 159, 183)
hslhsl(198, 36%, 56%)
oklchoklch(0.672 0.069 226.6)
Closest name: Atlas Cedar (#5ca0a7)Relative luminance 0.3104

Colors that go with #669fb7

Charcoal, Peru 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.

Real palettes that use #669fb7

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b77f66

#66b7a7 · #6677b7

#b7669f · #9fb766

Split-complementary

Open in tool →

#b76677 · #b7a766

#a766b7 · #b77f66 · #77b766

Contrast

#669fb7 as textRatioAAAA largeAAAFix
Aaon white
2.91:1failfailfail
  • AA: use #467d95 as the text (4.54:1)
  • AAA: use #345d6f as the text (7.14:1)
  • AA: or shift the background to #303030 (4.53:1)
  • AAA: or shift the background to #030303 (7.08:1)
Aaon black
7.21:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #669fb7 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

#669fb7 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #669fb7
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 #669fb7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/669fb7-9cb3c4-df4e69-1f232d-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