Color

#0d4aa5

#0d4aa5
hex#0d4aa5
rgbrgb(13, 74, 165)
hslhsl(216, 85%, 35%)
oklchoklch(0.432 0.159 259.5)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.077

Colors that go with #0d4aa5

Charcoal, Crimson and Steel Blue 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 →

#a5680d

#0d96a5 · #1d0da5

#a50d4a · #4aa50d

Split-complementary

Open in tool →

#a51d0d · #96a50d

#a50d96 · #a5680d · #0da51d

Contrast

#0d4aa5 as textRatioAAAA largeAAAFix
Aaon white
8.27:1passpasspassPasses AAA — no fix needed.
Aaon black
2.54:1failfailfail
  • AA: use #1d70ed as the text (4.59:1)
  • AAA: use #5a97f2 as the text (7.14:1)
  • AA: or shift the background to #c2c2c2 (4.64:1)
  • AAA: or shift the background to #ededed (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d4aa5 as the background.

Brands using this color

Fonts for this mood

#0d4aa5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d4aa5
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 #0d4aa5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d4aa5-9ca7c4-df5f4e-201f2d-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