Color

#043a67

#043a67
hex#043a67
rgbrgb(4, 58, 103)
hslhsl(207, 93%, 21%)
oklchoklch(0.343 0.094 250.3)
Closest name: Atlantic Navy (#13336f)Relative luminance 0.0403

Colors that go with #043a67

Crimson, Teal 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 →

#673104

#046762 · #040967

#67043b · #3b6704

Split-complementary

Open in tool →

#670409 · #676204

#620467 · #673104 · #096704

Contrast

#043a67 as textRatioAAAA largeAAAFix
Aaon white
11.63:1passpasspassPasses AAA — no fix needed.
Aaon black
1.81:1failfailfail
  • AA: use #0878d4 as the text (4.65:1)
  • AAA: use #2b9cf7 as the text (7.2:1)
  • AA: or shift the background to #a3a3a3 (4.61:1)
  • AAA: or shift the background to #c9c9c9 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043a67 as the background.

Brands using this color

Fonts for this mood

#043a67 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043a67
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 #043a67 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043a67-9cadc4-df4e53-1f212d-e9f1f1?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