Color

#374668

#374668
hex#374668
rgbrgb(55, 70, 104)
hslhsl(222, 31%, 31%)
oklchoklch(0.397 0.061 265.5)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0619

Colors that go with #374668

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 →

#685937

#375e68 · #403768

#683745 · #456837

Split-complementary

Open in tool →

#684037 · #5e6837

#68375e · #685937 · #376840

Contrast

#374668 as textRatioAAAA largeAAAFix
Aaon white
9.38:1passpasspassPasses AAA — no fix needed.
Aaon black
2.24:1failfailfail
  • AA: use #5f75ab as the text (4.62:1)
  • AAA: use #8395be as the text (7.01:1)
  • AA: or shift the background to #b5b5b5 (4.58:1)
  • AAA: or shift the background to #e0e0e0 (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 #374668 as the background.

Brands using this color

mcpConnect your agent — build around #374668
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 #374668 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374668-9ca3c4-df6e4e-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