Color

#002b5b

#002b5b
hex#002b5b
rgbrgb(0, 43, 91)
hslhsl(212, 100%, 18%)
oklchoklch(0.294 0.097 255.1)
Closest name: Marine (#042e60)Relative luminance 0.0248

Colors that go with #002b5b

Charcoal, Crimson and Slate 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 →

#5c3100

#00595c · #03005c

#5c002b · #2b5c00

Split-complementary

Open in tool →

#5c0300 · #595c00

#5c0059 · #5c3100 · #005c03

Contrast

#002b5b as textRatioAAAA largeAAAFix
Aaon white
14.03:1passpasspassPasses AAA — no fix needed.
Aaon black
1.5:1failfailfail
  • AA: use #0070f0 as the text (4.58:1)
  • AAA: use #3d98ff as the text (7.13:1)
  • AA: or shift the background to #949494 (4.63:1)
  • AAA: or shift the background to #b8b8b8 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #002b5b as the background.

Brands using this color

Fonts for this mood

#002b5b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #002b5b
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 #002b5b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/002b5b-9caac4-df564e-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