Color

#0d419b

#0d419b
hex#0d419b
rgbrgb(13, 65, 155)
hslhsl(218, 85%, 33%)
oklchoklch(0.404 0.156 260.9)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0623

Colors that go with #0d419b

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 →

#9c670d

#0d899c · #200d9c

#9c0d41 · #419c0d

Split-complementary

Open in tool →

#9c200d · #899c0d

#9c0d89 · #9c670d · #0d9c20

Contrast

#0d419b as textRatioAAAA largeAAAFix
Aaon white
9.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.25:1failfailfail
  • AA: use #266fed as the text (4.58:1)
  • AAA: use #5f95f2 as the text (7.07:1)
  • AA: or shift the background to #b5b5b5 (4.56:1)
  • AAA: or shift the background to #e0e0e0 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d419b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0d419b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d419b
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 #0d419b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d419b-9ca6c4-df644e-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