Color

#02403b

#02403b
hex#02403b
rgbrgb(2, 64, 59)
hslhsl(175, 94%, 13%)
oklchoklch(0.335 0.058 186)
Closest name: Rich Black (#004040)Relative luminance 0.04

Colors that go with #02403b

Crimson, Sea Green and 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 →

#400207

#02401c · #022640

#3b0240 · #403b02

Split-complementary

Open in tool →

#400226 · #401c02

#1c0240 · #400207 · #264002

Contrast

#02403b as textRatioAAAA largeAAAFix
Aaon white
11.67:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #04867b as the text (4.7:1)
  • AAA: use #05a89b as the text (7.08:1)
  • AA: or shift the background to #a1a1a1 (4.52:1)
  • AAA: or shift the background to #c9c9c9 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #02403b as the background.

Brands using this color

Fonts for this mood

#02403b reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #02403b
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 #02403b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/02403b-a2bdbe-d4599f-1f282d-e9f1ed?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