Color

#054571

#054571
hex#054571
rgbrgb(5, 69, 113)
hslhsl(204, 92%, 23%)
oklchoklch(0.379 0.095 246.4)
Closest name: Aegean Blue (#1b416f)Relative luminance 0.0548

Colors that go with #054571

Crimson, Royal Blue and Teal 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 →

#713005

#057166 · #050f71

#710545 · #457105

Split-complementary

Open in tool →

#71050f · #716605

#660571 · #713005 · #0f7105

Contrast

#054571 as textRatioAAAA largeAAAFix
Aaon white
10.02:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #0879c4 as the text (4.54:1)
  • AAA: use #149bf5 as the text (7.04:1)
  • AA: or shift the background to #b0b0b0 (4.62:1)
  • AAA: or shift the background to #d9d9d9 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #054571 as the background.

Brands using this color

Fonts for this mood

#054571 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #054571
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 #054571 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/054571-9cafc4-df4e5a-1f222d-e9f1f0?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