Color

#0b27da

#0b27da
hex#0b27da
rgbrgb(11, 39, 218)
hslhsl(232, 90%, 45%)
oklchoklch(0.429 0.26 265)
Closest name: Brutally Blue (#0022dd)Relative luminance 0.0658

Colors that go with #0b27da

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 →

#dabe0b

#0b8eda · #570bda

#da0b27 · #27da0b

Split-complementary

Open in tool →

#da570b · #8eda0b

#da0b8e · #dabe0b · #0bda57

Contrast

#0b27da as textRatioAAAA largeAAAFix
Aaon white
9.06:1passpasspassPasses AAA — no fix needed.
Aaon black
2.32:1failfailfail
  • AA: use #5167f6 as the text (4.62:1)
  • AAA: use #7c8df8 as the text (7.02:1)
  • AA: or shift the background to #b8b8b8 (4.57:1)
  • AAA: or shift the background to #e3e3e3 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0b27da as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#0b27da reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b27da
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 #0b27da and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b27da-9c9dc4-df864e-231f2d-e9eef1?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