Color

#0400eb

#0400eb
hex#0400eb
rgbrgb(4, 0, 235)
hslhsl(241, 100%, 46%)
oklchoklch(0.426 0.294 264.4)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0602

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e7eb00

#0071eb · #7900eb

#eb0400 · #00eb04

Split-complementary

Open in tool →

#eb7900 · #71eb00

#eb0071 · #e7eb00 · #00eb79

Contrast

#0400eb as textRatioAAAA largeAAAFix
Aaon white
9.52:1passpasspassPasses AAA — no fix needed.
Aaon black
2.2:1failfailfail
  • AA: use #6461ff as the text (4.7:1)
  • AAA: use #8c8aff as the text (7.19:1)
  • AA: or shift the background to #b3b3b3 (4.54:1)
  • AAA: or shift the background to #dedede (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 #0400eb as the background.

Brands using this color

Fonts for this mood

#0400eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0400eb
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 #0400eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0400eb-a19cc4-df9b4e-261f2d-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