Color

#04213e

#04213e
hex#04213e
rgbrgb(4, 33, 62)
hslhsl(210, 88%, 13%)
oklchoklch(0.245 0.065 251.7)
Closest name: Midnight Mirage (#001f3f)Relative luminance 0.0146

Colors that go with #04213e

Charcoal, Crimson 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 →

#3e2104

#043e3e · #04043e

#3e0421 · #213e04

Split-complementary

Open in tool →

#3e0404 · #3e3e04

#3e043e · #3e2104 · #043e04

Contrast

#04213e as textRatioAAAA largeAAAFix
Aaon white
16.25:1passpasspassPasses AAA — no fix needed.
Aaon black
1.29:1failfailfail
  • AA: use #0e75dd as the text (4.61:1)
  • AAA: use #3f99f3 as the text (7.06:1)
  • AA: or shift the background to #878787 (4.52:1)
  • AAA: or shift the background to #ababab (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #04213e as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#04213e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04213e
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 #04213e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04213e-9cabc4-df514e-1f202d-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