Color

#04243a

#04243a
hex#04243a
rgbrgb(4, 36, 58)
hslhsl(204, 87%, 12%)
oklchoklch(0.25 0.055 243.3)
Closest name: Midnight Dreams (#002233)Relative luminance 0.0159

Colors that go with #04243a

Charcoal, Royal Blue and Rust 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 →

#391904

#043934 · #040939

#390424 · #243904

Split-complementary

Open in tool →

#390409 · #393404

#340439 · #391904 · #093904

Contrast

#04243a as textRatioAAAA largeAAAFix
Aaon white
15.93:1passpasspassPasses AAA — no fix needed.
Aaon black
1.32:1failfailfail
  • AA: use #0e7bc4 as the text (4.65:1)
  • AAA: use #1f9cef as the text (7.06:1)
  • AA: or shift the background to #8a8a8a (4.61:1)
  • AAA: or shift the background to #adadad (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 #04243a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#04243a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04243a
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 #04243a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04243a-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