Color

#375ab9

#375ab9
hex#375ab9
rgbrgb(55, 90, 185)
hslhsl(224, 54%, 47%)
oklchoklch(0.495 0.155 265.7)
Closest name: Denim (#1560bd)Relative luminance 0.1163

Colors that go with #375ab9

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 →

#b99637

#379ab9 · #5537b9

#b9375a · #5ab937

Split-complementary

Open in tool →

#b95537 · #9ab937

#b9379a · #b99637 · #37b955

Contrast

#375ab9 as textRatioAAAA largeAAAFix
Aaon white
6.31:1passpassfail
  • AAA: use #3252a9 as the text (7.2:1)
Aaon black
3.33:1failpassfail
  • AA: use #5273cb as the text (4.67:1)
  • AAA: use #7d96d8 as the text (7.23:1)
  • AA: or shift the background to #dbdbdb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375ab9 as the background.

Brands using this color

Fonts for this mood

#375ab9 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375ab9
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 #375ab9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375ab9-9ca2c4-df724e-221f2d-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