Color

#0b4aa2

#0b4aa2
hex#0b4aa2
rgbrgb(11, 74, 162)
hslhsl(215, 87%, 34%)
oklchoklch(0.429 0.155 258.9)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0758

Colors that go with #0b4aa2

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 →

#a2630b

#0b96a2 · #180ba2

#a20b4a · #4aa20b

Split-complementary

Open in tool →

#a2180b · #96a20b

#a20b96 · #a2630b · #0ba218

Contrast

#0b4aa2 as textRatioAAAA largeAAAFix
Aaon white
8.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.52:1failfailfail
  • AA: use #1570ef as the text (4.6:1)
  • AAA: use #5396f3 as the text (7.02:1)
  • AA: or shift the background to #bfbfbf (4.54:1)
  • AAA: or shift the background to #ebebeb (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 #0b4aa2 as the background.

Brands using this color

Fonts for this mood

#0b4aa2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b4aa2
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 #0b4aa2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b4aa2-9ca8c4-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