Color

#0b0ecb

#0b0ecb
hex#0b0ecb
rgbrgb(11, 14, 203)
hslhsl(239, 90%, 42%)
oklchoklch(0.389 0.258 265.3)
Closest name: mediumblue (#0000cd)Relative luminance 0.047

Colors that go with #0b0ecb

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 →

#cbc80b

#0b6ecb · #680bcb

#cb0b0e · #0ecb0b

Split-complementary

Open in tool →

#cb680b · #6ecb0b

#cb0b6e · #cbc80b · #0bcb68

Contrast

#0b0ecb as textRatioAAAA largeAAAFix
Aaon white
10.83:1passpasspassPasses AAA — no fix needed.
Aaon black
1.94:1failfailfail
  • AA: use #5f62f7 as the text (4.58:1)
  • AAA: use #8b8df9 as the text (7.28:1)
  • AA: or shift the background to #a8a8a8 (4.55:1)
  • AAA: or shift the background to #d1d1d1 (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 #0b0ecb as the background.

Brands using this color

Fonts for this mood

#0b0ecb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b0ecb
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 #0b0ecb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b0ecb-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