Color

#374e77

#374e77
hex#374e77
rgbrgb(55, 78, 119)
hslhsl(218, 37%, 34%)
oklchoklch(0.425 0.074 261.4)
Closest name: Assassin (#2d4f83)Relative luminance 0.0759

Colors that go with #374e77

Sea Green, Blue 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.

Real palettes that use #374e77

Tints & shades

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

Harmonies

Complementary

Open in tool →

#775f37

#376e77 · #3f3777

#77374e · #4e7737

Split-complementary

Open in tool →

#773f37 · #6e7737

#77376e · #775f37 · #37773f

Contrast

#374e77 as textRatioAAAA largeAAAFix
Aaon white
8.34:1passpasspassPasses AAA — no fix needed.
Aaon black
2.52:1failfailfail
  • AA: use #5476b0 as the text (4.6:1)
  • AAA: use #7e97c4 as the text (7.11:1)
  • AA: or shift the background to #bfbfbf (4.53:1)
  • AAA: or shift the background to #ededed (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 #374e77 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#374e77 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374e77
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 #374e77 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374e77-9ca6c4-df644e-201f2d-e9f0f1?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