Answers for "js random blue color"

javascript random color

'#'+(0x1000000+(Math.random())*0xffffff).toString(16).substr(1,6)

javascript generate random color

const setBg = () => {
  const randomColor = Math.floor(Math.random()*16777215).toString(16);
  document.body.style.backgroundColor = "#" + randomColor;
  color.innerHTML = "#" + randomColor;
}

genNew.addEventListener("click", setBg);
setBg();