There are lots of clever one-liners for generating random colors:
'#'+Math.floor(Math.random()*16777215).toString(16);
Unfortunately, this code naturally produces lots of greys and browns and murky greens.
randomColor generates attractive colors by default. More specifically, randomColor produces bright colors with a reasonably high saturation. This makes randomColor particularly useful for data visualizations and generative art.
The result pictured above is generated using this code:
randomColor({hue: 'red', count: 18});