Color

#0a28ae

#0a28ae
hex#0a28ae
rgbrgb(10, 40, 174)
hslhsl(229, 89%, 36%)
oklchoklch(0.377 0.21 265.1)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0464

Colors that go with #0a28ae

Charcoal, Steel Blue and 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 →

#ae900a

#0a7aae · #3e0aae

#ae0a28 · #28ae0a

Split-complementary

Open in tool →

#ae3e0a · #7aae0a

#ae0a7a · #ae900a · #0aae3e

Contrast

#0a28ae as textRatioAAAA largeAAAFix
Aaon white
10.89:1passpasspassPasses AAA — no fix needed.
Aaon black
1.93:1failfailfail
  • AA: use #4867f4 as the text (4.52:1)
  • AAA: use #788ff7 as the text (7.07:1)
  • AA: or shift the background to #a8a8a8 (4.58:1)
  • AAA: or shift the background to #d1d1d1 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a28ae 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

#0a28ae reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a28ae
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 #0a28ae and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a28ae-9c9fc4-df7e4e-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