Color

#040a5d

#040a5d
hex#040a5d
rgbrgb(4, 10, 93)
hslhsl(236, 92%, 19%)
oklchoklch(0.232 0.139 266.2)
Closest name: Interstellar Blue (#001155)Relative luminance 0.0103

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5d5704

#04365d · #2b045d

#5d040a · #0a5d04

Split-complementary

Open in tool →

#5d2b04 · #365d04

#5d0436 · #5d5704 · #045d2b

Contrast

#040a5d as textRatioAAAA largeAAAFix
Aaon white
17.4:1passpasspassPasses AAA — no fix needed.
Aaon black
1.21:1failfailfail
  • AA: use #5963f8 as the text (4.56:1)
  • AAA: use #858cfa as the text (7.13:1)
  • AA: or shift the background to #828282 (4.53:1)
  • AAA: or shift the background to #a6a6a6 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040a5d 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

#040a5d reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040a5d
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 #040a5d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040a5d-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