Color

#375fb3

#375fb3
hex#375fb3
rgbrgb(55, 95, 179)
hslhsl(221, 53%, 46%)
oklchoklch(0.502 0.141 263.1)
Closest name: Denim (#1560bd)Relative luminance 0.1225

Colors that go with #375fb3

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 →

#b38c37

#379db3 · #4e37b3

#b3375f · #5fb337

Split-complementary

Open in tool →

#b34e37 · #9db337

#b3379d · #b38c37 · #37b34e

Contrast

#375fb3 as textRatioAAAA largeAAAFix
Aaon white
6.09:1passpassfail
  • AAA: use #3154a0 as the text (7.23:1)
Aaon black
3.45:1failpassfail
  • AA: use #4c73c8 as the text (4.59:1)
  • AAA: use #7a97d6 as the text (7.23:1)
  • AA: or shift the background to #dedede (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375fb3 as the background.

Brands using this color

Fonts for this mood

#375fb3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375fb3
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 #375fb3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375fb3-9ca4c4-df6b4e-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