Color

#0f5ef0

#0f5ef0
hex#0f5ef0
rgbrgb(15, 94, 240)
hslhsl(219, 88%, 50%)
oklchoklch(0.537 0.231 261.8)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.144

Colors that go with #0f5ef0

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 →

#f0a10f

#0fcef0 · #310ff0

#f00f5e · #5ef00f

Split-complementary

Open in tool →

#f0310f · #cef00f

#f00fce · #f0a10f · #0ff031

Contrast

#0f5ef0 as textRatioAAAA largeAAAFix
Aaon white
5.41:1passpassfail
  • AAA: use #0d4fc9 as the text (7.05:1)
Aaon black
3.88:1failpassfail
  • AA: use #276ef1 as the text (4.59:1)
  • AAA: use #6195f5 as the text (7.13:1)
  • AA: or shift the background to #ebebeb (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0f5ef0 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0f5ef0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0f5ef0
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 #0f5ef0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0f5ef0-9ca5c4-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