Color

#0004fa

#0004fa
hex#0004fa
rgbrgb(0, 4, 250)
hslhsl(239, 100%, 49%)
oklchoklch(0.447 0.308 264.1)
Closest name: blue (#0000ff)Relative luminance 0.0699

Tints & shades

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

Harmonies

Complementary

Open in tool →

#faf600

#0081fa · #7900fa

#fa0004 · #04fa00

Split-complementary

Open in tool →

#fa7900 · #81fa00

#fa0081 · #faf600 · #00fa79

Contrast

#0004fa as textRatioAAAA largeAAAFix
Aaon white
8.76:1passpasspassPasses AAA — no fix needed.
Aaon black
2.4:1failfailfail
  • AA: use #5c5fff as the text (4.54:1)
  • AAA: use #8a8cff as the text (7.28:1)
  • AA: or shift the background to #bababa (4.51:1)
  • AAA: or shift the background to #e6e6e6 (7.02:1)

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

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/0004fa-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