Color

#316da5

#316da5
hex#316da5
rgbrgb(49, 109, 165)
hslhsl(209, 54%, 42%)
oklchoklch(0.522 0.108 249.3)
Closest name: Brilliant Blue (#0075b3)Relative luminance 0.1431

Colors that go with #316da5

Charcoal, Crimson 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 →

#a56931

#31a5a3 · #3133a5

#a5316d · #6da531

Split-complementary

Open in tool →

#a53133 · #a5a331

#a331a5 · #a56931 · #33a531

Contrast

#316da5 as textRatioAAAA largeAAAFix
Aaon white
5.44:1passpassfail
  • AAA: use #295b89 as the text (7.11:1)
Aaon black
3.86:1failpassfail
  • AA: use #377ab9 as the text (4.65:1)
  • AAA: use #629bd0 as the text (7.12:1)
  • AA: or shift the background to #ebebeb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #316da5 as the background.

Brands using this color

Fonts for this mood

#316da5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #316da5
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 #316da5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/316da5-9cacc4-df4e4e-1f212d-e9f1f1?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