Color

#05389e

#05389e
hex#05389e
rgbrgb(5, 56, 158)
hslhsl(220, 94%, 32%)
oklchoklch(0.387 0.173 262.3)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0533

Colors that go with #05389e

Charcoal, Crimson and Steel 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 →

#9e6b05

#05859e · #1e059e

#9e0538 · #389e05

Split-complementary

Open in tool →

#9e1e05 · #859e05

#9e0585 · #9e6b05 · #059e1e

Contrast

#05389e as textRatioAAAA largeAAAFix
Aaon white
10.17:1passpasspassPasses AAA — no fix needed.
Aaon black
2.07:1failfailfail
  • AA: use #256cf8 as the text (4.58:1)
  • AAA: use #6194fa as the text (7.12:1)
  • AA: or shift the background to #adadad (4.53:1)
  • AAA: or shift the background to #d9d9d9 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #05389e as the background.

Brands using this color

Fonts for this mood

#05389e reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #05389e
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 #05389e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/05389e-9ca5c4-df694e-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