Color

#040fe7

#040fe7
hex#040fe7
rgbrgb(4, 15, 231)
hslhsl(237, 97%, 46%)
oklchoklch(0.426 0.286 264.5)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0614

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e7dc04

#0481e7 · #6a04e7

#e7040f · #0fe704

Split-complementary

Open in tool →

#e76a04 · #81e704

#e70481 · #e7dc04 · #04e76a

Contrast

#040fe7 as textRatioAAAA largeAAAFix
Aaon white
9.43:1passpasspassPasses AAA — no fix needed.
Aaon black
2.23:1failfailfail
  • AA: use #5961fc as the text (4.54:1)
  • AAA: use #868cfd as the text (7.18:1)
  • AA: or shift the background to #b5b5b5 (4.6:1)
  • AAA: or shift the background to #dedede (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #040fe7 as the background.

Brands using this color

Fonts for this mood

#040fe7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #040fe7
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 #040fe7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/040fe7-9f9cc4-df924e-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