Color

#315fc4

#315fc4
hex#315fc4
rgbrgb(49, 95, 196)
hslhsl(221, 60%, 48%)
oklchoklch(0.511 0.166 263.3)
Closest name: Denim (#1560bd)Relative luminance 0.1282

Colors that go with #315fc4

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 →

#c49531

#31a9c4 · #4c31c4

#c4315f · #5fc431

Split-complementary

Open in tool →

#c44c31 · #a9c431

#c431a9 · #c49531 · #31c44c

Contrast

#315fc4 as textRatioAAAA largeAAAFix
Aaon white
5.89:1passpassfail
  • AAA: use #2b54ab as the text (7.1:1)
Aaon black
3.56:1failpassfail
  • AA: use #4773d1 as the text (4.64:1)
  • AAA: use #7495dc as the text (7.08:1)
  • AA: or shift the background to #e3e3e3 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #315fc4 as the background.

Brands using this color

Fonts for this mood

#315fc4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #315fc4
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 #315fc4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/315fc4-9ca4c4-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