Color

#0c4bb0

#0c4bb0
hex#0c4bb0
rgbrgb(12, 75, 176)
hslhsl(217, 87%, 37%)
oklchoklch(0.443 0.172 260.4)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0824

Colors that go with #0c4bb0

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 →

#b0720c

#0c9db0 · #1f0cb0

#b00c4b · #4bb00c

Split-complementary

Open in tool →

#b01f0c · #9db00c

#b00c9d · #b0720c · #0cb01f

Contrast

#0c4bb0 as textRatioAAAA largeAAAFix
Aaon white
7.93:1passpasspassPasses AAA — no fix needed.
Aaon black
2.65:1failfailfail
  • AA: use #1f6fef as the text (4.58:1)
  • AAA: use #5d97f4 as the text (7.2:1)
  • AA: or shift the background to #c4c4c4 (4.55:1)
  • AAA: or shift the background to #f2f2f2 (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 #0c4bb0 as the background.

Brands using this color

Fonts for this mood

#0c4bb0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0c4bb0
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 #0c4bb0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0c4bb0-9ca7c4-df624e-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