Color

#040d53

#040d53
hex#040d53
rgbrgb(4, 13, 83)
hslhsl(233, 91%, 17%)
oklchoklch(0.222 0.124 266.3)
Closest name: Interstellar Blue (#001155)Relative luminance 0.0094

Tints & shades

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

Harmonies

Complementary

Open in tool →

#534a04

#043553 · #220453

#53040d · #0d5304

Split-complementary

Open in tool →

#532204 · #355304

#530435 · #534a04 · #045322

Contrast

#040d53 as textRatioAAAA largeAAAFix
Aaon white
17.68:1passpasspassPasses AAA — no fix needed.
Aaon black
1.19:1failfailfail
  • AA: use #5567f7 as the text (4.67:1)
  • AAA: use #808ef9 as the text (7.15:1)
  • AA: or shift the background to #828282 (4.6:1)
  • AAA: or shift the background to #a3a3a3 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040d53 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

#040d53 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040d53
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 #040d53 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040d53-9c9cc4-df884e-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