Color

#040d2f

#040d2f
hex#040d2f
rgbrgb(4, 13, 47)
hslhsl(227, 84%, 10%)
oklchoklch(0.177 0.07 266)
Closest name: Mysterious Depths (#060929)Relative luminance 0.0052

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#2f2604

#04232f · #10042f

#2f040d · #0d2f04

Split-complementary

Open in tool →

#2f1004 · #232f04

#2f0423 · #2f2604 · #042f10

Contrast

#040d2f as textRatioAAAA largeAAAFix
Aaon white
19.03:1passpasspassPasses AAA — no fix needed.
Aaon black
1.1:1failfailfail
  • AA: use #486cef as the text (4.67:1)
  • AAA: use #7792f3 as the text (7.19:1)
  • AA: or shift the background to #7d7d7d (4.62:1)
  • AAA: or shift the background to #9e9e9e (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 #040d2f as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#040d2f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040d2f
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #040d2f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040d2f-9ca0c4-df7a4e-221f2d-e9eff1?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