Color

#040b2f

#040b2f
hex#040b2f
rgbrgb(4, 11, 47)
hslhsl(230, 84%, 10%)
oklchoklch(0.172 0.073 267.4)
Closest name: Mysterious Depths (#060929)Relative luminance 0.0047

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2f2804

#04212f · #12042f

#2f040b · #0b2f04

Split-complementary

Open in tool →

#2f1204 · #212f04

#2f0421 · #2f2804 · #042f12

Contrast

#040b2f as textRatioAAAA largeAAAFix
Aaon white
19.19:1passpasspassPasses AAA — no fix needed.
Aaon black
1.09:1failfailfail
  • AA: use #4d68ef as the text (4.54:1)
  • AAA: use #7c90f4 as the text (7.15:1)
  • AA: or shift the background to #7d7d7d (4.66:1)
  • AAA: or shift the background to #9e9e9e (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040b2f 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

#040b2f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040b2f
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 #040b2f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040b2f-9c9ec4-df814e-231f2d-e9eef1?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