Color

#375ac3

#375ac3
hex#375ac3
rgbrgb(55, 90, 195)
hslhsl(225, 56%, 49%)
oklchoklch(0.503 0.169 266.4)
Closest name: Denim (#1560bd)Relative luminance 0.1206

Colors that go with #375ac3

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 →

#c3a037

#37a0c3 · #5a37c3

#c3375a · #5ac337

Split-complementary

Open in tool →

#c35a37 · #a0c337

#c337a0 · #c3a037 · #37c35a

Contrast

#375ac3 as textRatioAAAA largeAAAFix
Aaon white
6.15:1passpassfail
  • AAA: use #3151af as the text (7.18:1)
Aaon black
3.41:1failpassfail
  • AA: use #506fce as the text (4.51:1)
  • AAA: use #7c93da as the text (7.04:1)
  • AA: or shift the background to #dedede (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375ac3 as the background.

Brands using this color

Fonts for this mood

#375ac3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375ac3
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 #375ac3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375ac3-9ca1c4-df754e-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