Color

#374a53

#374a53
hex#374a53
rgbrgb(55, 74, 83)
hslhsl(199, 20%, 27%)
oklchoklch(0.397 0.028 228.6)
Closest name: Charcoal (#36454f)Relative luminance 0.0633

Colors that go with #374a53

Blue, Blush Pink and Cadet Blue 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 →

#534037

#37534e · #373c53

#53374a · #4a5337

Split-complementary

Open in tool →

#53373c · #534e37

#4e3753 · #534037 · #3c5337

Contrast

#374a53 as textRatioAAAA largeAAAFix
Aaon white
9.26:1passpasspassPasses AAA — no fix needed.
Aaon black
2.27:1failfailfail
  • AA: use #5c7b8a as the text (4.66:1)
  • AAA: use #7e9ca9 as the text (7.22:1)
  • AA: or shift the background to #b5b5b5 (4.52:1)
  • AAA: or shift the background to #e0e0e0 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374a53 as the background.

Brands using this color

Fonts for this mood

#374a53 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374a53
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 #374a53 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374a53-9cb3c4-df4e66-1f232d-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