Color

#315ec9

#315ec9
hex#315ec9
rgbrgb(49, 94, 201)
hslhsl(222, 61%, 49%)
oklchoklch(0.513 0.174 264)
Closest name: Denim (#1560bd)Relative luminance 0.1288

Colors that go with #315ec9

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 →

#c99b31

#31abc9 · #4f31c9

#c9315e · #5ec931

Split-complementary

Open in tool →

#c94f31 · #abc931

#c931ab · #c99b31 · #31c94f

Contrast

#315ec9 as textRatioAAAA largeAAAFix
Aaon white
5.87:1passpassfail
  • AAA: use #2b53b1 as the text (7.06:1)
Aaon black
3.58:1failpassfail
  • AA: use #4670d2 as the text (4.51:1)
  • AAA: use #7896de as the text (7.22:1)
  • AA: or shift the background to #e3e3e3 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #315ec9 as the background.

Brands using this color

Fonts for this mood

#315ec9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #315ec9
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 #315ec9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/315ec9-9ca3c4-df6e4e-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