Color

#0d339b

#0d339b
hex#0d339b
rgbrgb(13, 51, 155)
hslhsl(224, 85%, 33%)
oklchoklch(0.375 0.174 264)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0482

Colors that go with #0d339b

Charcoal, Steel Blue and 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 →

#9c760d

#0d7a9c · #2e0d9c

#9c0d33 · #339c0d

Split-complementary

Open in tool →

#9c2e0d · #7a9c0d

#9c0d7a · #9c760d · #0d9c2e

Contrast

#0d339b as textRatioAAAA largeAAAFix
Aaon white
10.69:1passpasspassPasses AAA — no fix needed.
Aaon black
1.96:1failfailfail
  • AA: use #3e6def as the text (4.64:1)
  • AAA: use #7194f4 as the text (7.24:1)
  • AA: or shift the background to #ababab (4.66:1)
  • AAA: or shift the background to #d1d1d1 (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d339b as the background.

Brands using this color

Fonts for this mood

#0d339b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d339b
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 #0d339b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d339b-9ca2c4-df724e-221f2d-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