Color

#669fa9

#669fa9
hex#669fa9
rgbrgb(102, 159, 169)
hslhsl(189, 28%, 53%)
oklchoklch(0.667 0.061 209.7)
Closest name: Atlas Cedar (#5ca0a7)Relative luminance 0.3049

Colors that go with #669fa9

Charcoal, Terracotta 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 #669fa9

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a97066

#66a991 · #667da9

#a9669f · #9fa966

Split-complementary

Open in tool →

#a9667d · #a99166

#9166a9 · #a97066 · #7da966

Contrast

#669fa9 as textRatioAAAA largeAAAFix
Aaon white
2.96:1failfailfail
  • AA: use #4b7d86 as the text (4.59:1)
  • AAA: use #395f65 as the text (7:1)
  • AA: or shift the background to #2e2e2e (4.59:1)
  • AAA: or shift the background to #000000 (7.1:1)
Aaon black
7.1:1passpasspassPasses 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 #669fa9 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 #669fa9
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 #669fa9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/669fa9-a2b7be-df4e7e-1f252d-e9f1ee?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