Color

#040b3a

#040b3a
hex#040b3a
rgbrgb(4, 11, 58)
hslhsl(232, 87%, 12%)
oklchoklch(0.186 0.09 267.4)
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 →

#393204

#042639 · #180439

#39040b · #0b3904

Split-complementary

Open in tool →

#391804 · #263904

#390426 · #393204 · #043918

Contrast

#040b3a as textRatioAAAA largeAAAFix
Aaon white
18.85:1passpasspassPasses AAA — no fix needed.
Aaon black
1.11:1failfailfail
  • AA: use #5369f3 as the text (4.68:1)
  • AAA: use #7e8ef6 as the text (7.09:1)
  • AA: or shift the background to #7d7d7d (4.58:1)
  • AAA: or shift the background to #9e9e9e (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040b3a 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

#040b3a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040b3a
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 #040b3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040b3a-9c9dc4-df864e-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