Color

#669fb2

#669fb2
hex#669fb2
rgbrgb(102, 159, 178)
hslhsl(195, 33%, 55%)
oklchoklch(0.67 0.066 221.1)
Closest name: Atlas Cedar (#5ca0a7)Relative luminance 0.3084

Colors that go with #669fb2

Charcoal, Terracotta 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 #669fb2

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b27966

#66b29f · #6679b2

#b2669f · #9fb266

Split-complementary

Open in tool →

#b26679 · #b29f66

#9f66b2 · #b27966 · #79b266

Contrast

#669fb2 as textRatioAAAA largeAAAFix
Aaon white
2.93:1failfailfail
  • AA: use #487d8e as the text (4.57:1)
  • AAA: use #355c69 as the text (7.28:1)
  • AA: or shift the background to #303030 (4.5:1)
  • AAA: or shift the background to #030303 (7.04:1)
Aaon black
7.17:1passpasspassPasses 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 #669fb2 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 #669fb2
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 #669fb2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/669fb2-9cb5c4-df4e70-1f242d-e9f1ef?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