Color

#043c48

#043c48
hex#043c48
rgbrgb(4, 60, 72)
hslhsl(191, 89%, 15%)
oklchoklch(0.329 0.057 217)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.0373

Colors that go with #043c48

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 →

#481104

#044833 · #041a48

#48043c · #3c4804

Split-complementary

Open in tool →

#48041a · #483304

#330448 · #481104 · #1a4804

Contrast

#043c48 as textRatioAAAA largeAAAFix
Aaon white
12.03:1passpasspassPasses AAA — no fix needed.
Aaon black
1.75:1failfailfail
  • AA: use #09809a as the text (4.57:1)
  • AAA: use #0ca3c6 as the text (7.07:1)
  • AA: or shift the background to #a1a1a1 (4.66:1)
  • AAA: or shift the background to #c7c7c7 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043c48 as the background.

Brands using this color

Fonts for this mood

#043c48 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043c48
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 #043c48 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043c48-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