Color

#0f48cc

#0f48cc
hex#0f48cc
rgbrgb(15, 72, 204)
hslhsl(222, 86%, 43%)
oklchoklch(0.463 0.211 263.1)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.091

Colors that go with #0f48cc

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 →

#cc930f

#0fa6cc · #350fcc

#cc0f48 · #48cc0f

Split-complementary

Open in tool →

#cc350f · #a6cc0f

#cc0fa6 · #cc930f · #0fcc35

Contrast

#0f48cc as textRatioAAAA largeAAAFix
Aaon white
7.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #336cf0 as the text (4.54:1)
  • AAA: use #6c95f4 as the text (7.24:1)
  • AA: or shift the background to #cccccc (4.64:1)
  • AAA: or shift the background to #fafafa (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0f48cc as the background.

Brands using this color

Fonts for this mood

#0f48cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0f48cc
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 #0f48cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0f48cc-9ca3c4-df6e4e-211f2d-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