Color

#040d90

#040d90
hex#040d90
rgbrgb(4, 13, 144)
hslhsl(236, 95%, 29%)
oklchoklch(0.306 0.197 265.1)
Closest name: Everlasting Night (#000099)Relative luminance 0.0233

Tints & shades

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

Harmonies

Complementary

Open in tool →

#908704

#045390 · #410490

#90040d · #0d9004

Split-complementary

Open in tool →

#904104 · #539004

#900453 · #908704 · #049041

Contrast

#040d90 as textRatioAAAA largeAAAFix
Aaon white
14.33:1passpasspassPasses AAA — no fix needed.
Aaon black
1.47:1failfailfail
  • AA: use #5b66fb as the text (4.74:1)
  • AAA: use #838bfc as the text (7.06:1)
  • AA: or shift the background to #919191 (4.55:1)
  • AAA: or shift the background to #b8b8b8 (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040d90 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

#040d90 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040d90
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 #040d90 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040d90-9e9cc4-df8f4e-241f2d-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