Color

#040a58

#040a58
hex#040a58
rgbrgb(4, 10, 88)
hslhsl(236, 91%, 18%)
oklchoklch(0.225 0.133 266.4)
Closest name: Ravenclaw (#0a0555)Relative luminance 0.0095

Tints & shades

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

Harmonies

Complementary

Open in tool →

#585204

#043358 · #280458

#58040a · #0a5804

Split-complementary

Open in tool →

#582804 · #335804

#580433 · #585204 · #045828

Contrast

#040a58 as textRatioAAAA largeAAAFix
Aaon white
17.65:1passpasspassPasses AAA — no fix needed.
Aaon black
1.19:1failfailfail
  • AA: use #5964f7 as the text (4.59:1)
  • AAA: use #858df9 as the text (7.18:1)
  • AA: or shift the background to #828282 (4.59:1)
  • AAA: or shift the background to #a6a6a6 (7.25:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040a58 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

#040a58 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040a58
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 #040a58 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040a58-9e9cc4-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