Color

#0a04be

#0a04be
hex#0a04be
rgbrgb(10, 4, 190)
hslhsl(242, 96%, 38%)
oklchoklch(0.366 0.248 265.3)
Closest name: mediumblue (#0000cd)Relative luminance 0.0387

Colors that go with #0a04be

Charcoal, Crimson and Cobalt 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 →

#b8be04

#045bbe · #6704be

#be0a04 · #04be0a

Split-complementary

Open in tool →

#be6704 · #5bbe04

#be045b · #b8be04 · #04be67

Contrast

#0a04be as textRatioAAAA largeAAAFix
Aaon white
11.84:1passpasspassPasses AAA — no fix needed.
Aaon black
1.77:1failfailfail
  • AA: use #645ffc as the text (4.58:1)
  • AAA: use #908cfd as the text (7.36:1)
  • AA: or shift the background to #a1a1a1 (4.58:1)
  • AAA: or shift the background to #c7c7c7 (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 #0a04be as the background.

Brands using this color

Fonts for this mood

#0a04be reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a04be
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 #0a04be and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a04be-a29cc4-df9e4e-261f2d-e9edf1?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