Color

#375cb9

#375cb9
hex#375cb9
rgbrgb(55, 92, 185)
hslhsl(223, 54%, 47%)
oklchoklch(0.499 0.153 265)
Closest name: Denim (#1560bd)Relative luminance 0.1197

Colors that go with #375cb9

Charcoal, Sea Green 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b99437

#379db9 · #5337b9

#b9375c · #5cb937

Split-complementary

Open in tool →

#b95337 · #9db937

#b9379d · #b99437 · #37b953

Contrast

#375cb9 as textRatioAAAA largeAAAFix
Aaon white
6.19:1passpassfail
  • AAA: use #3254a9 as the text (7.05:1)
Aaon black
3.39:1failpassfail
  • AA: use #4e71ca as the text (4.54:1)
  • AAA: use #7994d7 as the text (7.03:1)
  • AA: or shift the background to #dedede (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375cb9 as the background.

Brands using this color

Fonts for this mood

#375cb9 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375cb9
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 #375cb9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375cb9-9ca3c4-df704e-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