Color

#04159a

#04159a
hex#04159a
rgbrgb(4, 21, 154)
hslhsl(233, 95%, 31%)
oklchoklch(0.327 0.203 264.9)
Closest name: Everlasting Night (#000099)Relative luminance 0.029

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9a8904

#04619a · #3e049a

#9a0415 · #159a04

Split-complementary

Open in tool →

#9a3e04 · #619a04

#9a0461 · #9a8904 · #049a3e

Contrast

#04159a as textRatioAAAA largeAAAFix
Aaon white
13.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.58:1failfailfail
  • AA: use #5165fb as the text (4.6:1)
  • AAA: use #7e8cfc as the text (7.04:1)
  • AA: or shift the background to #999999 (4.67:1)
  • AAA: or shift the background to #bdbdbd (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #04159a 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

#04159a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04159a
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 #04159a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04159a-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