Color

#0f12d2

#0f12d2
hex#0f12d2
rgbrgb(15, 18, 210)
hslhsl(239, 87%, 44%)
oklchoklch(0.402 0.263 265.7)
Closest name: mediumblue (#0000cd)Relative luminance 0.0519

Colors that go with #0f12d2

Charcoal, Crimson and Cornflower 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 →

#d2cf0f

#0f73d2 · #6d0fd2

#d20f12 · #12d20f

Split-complementary

Open in tool →

#d26d0f · #73d20f

#d20f73 · #d2cf0f · #0fd26d

Contrast

#0f12d2 as textRatioAAAA largeAAAFix
Aaon white
10.31:1passpasspassPasses AAA — no fix needed.
Aaon black
2.04:1failfailfail
  • AA: use #6264f4 as the text (4.65:1)
  • AAA: use #888af7 as the text (7.03:1)
  • AA: or shift the background to #adadad (4.59:1)
  • AAA: or shift the background to #d6d6d6 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0f12d2 as the background.

Brands using this color

Fonts for this mood

#0f12d2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0f12d2
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 #0f12d2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0f12d2-a09cc4-df964e-251f2d-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