Color

#0f5ceb

#0f5ceb
hex#0f5ceb
rgbrgb(15, 92, 235)
hslhsl(219, 88%, 49%)
oklchoklch(0.529 0.227 261.8)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1375

Colors that go with #0f5ceb

Charcoal, Crimson and Amber 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 →

#eb9e0f

#0fcaeb · #300feb

#eb0f5c · #5ceb0f

Split-complementary

Open in tool →

#eb300f · #caeb0f

#eb0fca · #eb9e0f · #0feb30

Contrast

#0f5ceb as textRatioAAAA largeAAAFix
Aaon white
5.6:1passpassfail
  • AAA: use #0d4fc9 as the text (7.05:1)
Aaon black
3.75:1failpassfail
  • AA: use #276ef1 as the text (4.59:1)
  • AAA: use #6195f5 as the text (7.13:1)
  • AA: or shift the background to #e8e8e8 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0f5ceb as the background.

Brands using this color

Fonts for this mood

#0f5ceb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0f5ceb
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 #0f5ceb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0f5ceb-9ca5c4-df664e-211f2d-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