Color

#374667

#374667
hex#374667
rgbrgb(55, 70, 103)
hslhsl(221, 30%, 31%)
oklchoklch(0.396 0.059 265.1)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0617

Colors that go with #374667

Steel Blue, Blue 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#675837

#375e67 · #403767

#673746 · #466737

Split-complementary

Open in tool →

#674037 · #5e6737

#67375e · #675837 · #376740

Contrast

#374667 as textRatioAAAA largeAAAFix
Aaon white
9.4:1passpasspassPasses AAA — no fix needed.
Aaon black
2.23:1failfailfail
  • AA: use #5d74a8 as the text (4.53:1)
  • AAA: use #8496bd as the text (7.08:1)
  • AA: or shift the background to #b5b5b5 (4.58:1)
  • AAA: or shift the background to #e0e0e0 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374667 as the background.

Brands using this color

mcpConnect your agent — build around #374667
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 #374667 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374667-9ca4c4-df6b4e-211f2d-e9eff1?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