Color

#040fec

#040fec
hex#040fec
rgbrgb(4, 15, 236)
hslhsl(237, 97%, 47%)
oklchoklch(0.433 0.291 264.4)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0642

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ece004

#0483ec · #6c04ec

#ec040f · #0fec04

Split-complementary

Open in tool →

#ec6c04 · #83ec04

#ec0483 · #ece004 · #04ec6c

Contrast

#040fec as textRatioAAAA largeAAAFix
Aaon white
9.19:1passpasspassPasses AAA — no fix needed.
Aaon black
2.28:1failfailfail
  • AA: use #5961fc as the text (4.54:1)
  • AAA: use #868cfd as the text (7.18:1)
  • AA: or shift the background to #b8b8b8 (4.63:1)
  • AAA: or shift the background to #e3e3e3 (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 #040fec as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/040fec-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