Color

#040f2f

#040f2f
hex#040f2f
rgbrgb(4, 15, 47)
hslhsl(225, 84%, 10%)
oklchoklch(0.182 0.067 264.4)
Closest name: Infinite Night (#071037)Relative luminance 0.0057

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2f2404

#04242f · #0f042f

#2f040f · #0f2f04

Split-complementary

Open in tool →

#2f0f04 · #242f04

#2f0424 · #2f2404 · #042f0f

Contrast

#040f2f as textRatioAAAA largeAAAFix
Aaon white
18.84:1passpasspassPasses AAA — no fix needed.
Aaon black
1.11:1failfailfail
  • AA: use #3f6bee as the text (4.55:1)
  • AAA: use #7292f3 as the text (7.12:1)
  • AA: or shift the background to #7d7d7d (4.58:1)
  • AAA: or shift the background to #9e9e9e (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040f2f 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

#040f2f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040f2f
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 #040f2f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040f2f-9ca1c4-df754e-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