Color

#315db4

#315db4
hex#315db4
rgbrgb(49, 93, 180)
hslhsl(220, 57%, 45%)
oklchoklch(0.495 0.147 262.3)
Closest name: Denim (#1560bd)Relative luminance 0.1178

Colors that go with #315db4

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 →

#b48931

#319eb4 · #4731b4

#b4315d · #5db431

Split-complementary

Open in tool →

#b44731 · #9eb431

#b4319e · #b48931 · #31b447

Contrast

#315db4 as textRatioAAAA largeAAAFix
Aaon white
6.26:1passpassfail
  • AAA: use #2d55a4 as the text (7.13:1)
Aaon black
3.36:1failpassfail
  • AA: use #4773cd as the text (4.6:1)
  • AAA: use #7395d9 as the text (7.03:1)
  • AA: or shift the background to #dbdbdb (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 #315db4 as the background.

Brands using this color

Fonts for this mood

#315db4 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #315db4
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 #315db4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/315db4-9ca5c4-df694e-211f2d-e9f0f1?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