Color

#043c49

#043c49
hex#043c49
rgbrgb(4, 60, 73)
hslhsl(191, 90%, 15%)
oklchoklch(0.33 0.057 218.6)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.0374

Colors that go with #043c49

Crimson, Steel 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 →

#491004

#044933 · #041a49

#49043c · #3c4904

Split-complementary

Open in tool →

#49041a · #493304

#330449 · #491004 · #1a4904

Contrast

#043c49 as textRatioAAAA largeAAAFix
Aaon white
12.02:1passpasspassPasses AAA — no fix needed.
Aaon black
1.75:1failfailfail
  • AA: use #08809b as the text (4.57:1)
  • AAA: use #0aa4c7 as the text (7.15:1)
  • AA: or shift the background to #a1a1a1 (4.65:1)
  • AAA: or shift the background to #c7c7c7 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043c49 as the background.

Brands using this color

Fonts for this mood

#043c49 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043c49
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 #043c49 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043c49-a2b6be-df4e7a-1f252d-e9f1ef?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