Color

#0004ff

#0004ff
hex#0004ff
rgbrgb(0, 4, 255)
hslhsl(239, 100%, 50%)
oklchoklch(0.453 0.312 264.1)
Closest name: blue (#0000ff)Relative luminance 0.0731

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fffb00

#0084ff · #7b00ff

#ff0004 · #04ff00

Split-complementary

Open in tool →

#ff7b00 · #84ff00

#ff0084 · #fffb00 · #00ff7b

Contrast

#0004ff as textRatioAAAA largeAAAFix
Aaon white
8.53:1passpasspassPasses AAA — no fix needed.
Aaon black
2.46:1failfailfail
  • AA: use #5c5fff as the text (4.54:1)
  • AAA: use #8a8cff as the text (7.28:1)
  • AA: or shift the background to #bdbdbd (4.54:1)
  • AAA: or shift the background to #ebebeb (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0004ff as the background.

Brands using this color

Fonts for this mood

#0004ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0004ff
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 #0004ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0004ff-a09cc4-df964e-251f2d-e9edf1?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