Color

#0d4aa0

#0d4aa0
hex#0d4aa0
rgbrgb(13, 74, 160)
hslhsl(215, 85%, 34%)
oklchoklch(0.427 0.152 258.8)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0752

Colors that go with #0d4aa0

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 →

#a0630d

#0d94a0 · #190da0

#a00d4a · #4aa00d

Split-complementary

Open in tool →

#a0190d · #94a00d

#a00d94 · #a0630d · #0da019

Contrast

#0d4aa0 as textRatioAAAA largeAAAFix
Aaon white
8.39:1passpasspassPasses AAA — no fix needed.
Aaon black
2.5:1failfailfail
  • AA: use #1870ec as the text (4.57:1)
  • AAA: use #5596f1 as the text (7.02:1)
  • AA: or shift the background to #bfbfbf (4.56:1)
  • AAA: or shift the background to #ebebeb (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d4aa0 as the background.

Brands using this color

Fonts for this mood

#0d4aa0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d4aa0
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 #0d4aa0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d4aa0-9ca8c4-df5d4e-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