Color

#0d4da0

#0d4da0
hex#0d4da0
rgbrgb(13, 77, 160)
hslhsl(214, 85%, 34%)
oklchoklch(0.434 0.148 257.8)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0793

Colors that go with #0d4da0

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 →

#a0610d

#0d97a0 · #170da0

#a00d4d · #4da00d

Split-complementary

Open in tool →

#a0170d · #97a00d

#a00d97 · #a0610d · #0da017

Contrast

#0d4da0 as textRatioAAAA largeAAAFix
Aaon white
8.12:1passpasspassPasses AAA — no fix needed.
Aaon black
2.59:1failfailfail
  • AA: use #1371ec as the text (4.6:1)
  • AAA: use #5599f1 as the text (7.21:1)
  • AA: or shift the background to #c2c2c2 (4.56:1)
  • AAA: or shift the background to #f0f0f0 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d4da0 as the background.

Brands using this color

Fonts for this mood

#0d4da0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d4da0
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 #0d4da0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d4da0-9ca9c4-df5a4e-1f1f2d-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