JavaScript случайный RGB
var r = () => Math.random() * 256 >> 0;
var color = `rgb(${r()}, ${r()}, ${r()})`;
TC5550
var r = () => Math.random() * 256 >> 0;
var color = `rgb(${r()}, ${r()}, ${r()})`;'#'+(0x1000000+(Math.random())*0xffffff).toString(16).substr(1,6)function random_rgba() {
var o = Math.round, r = Math.random, s = 255;
return 'rgba(' + o(r()*s) + ',' + o(r()*s) + ',' + o(r()*s) + ',' + r().toFixed(1) + ')';
}
var color = random_rgba();
g.fillStyle = color;
g.strokeStyle = color;