index.js

const hex = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f"]
let hexcode = "#41b3a3" // change default background color

function initialColor() {
  document.body.style.background = hexcode
  document.getElementById("title").innerHTML = hexcode
}

function colorGenerator() {
  const hexarray = []

  for (i = 0; i < 6; i++) {
    const random = Math.floor(Math.random() * 16)
    hexarray.push(hex[random])
  }
  hexcode = "#" + hexarray.join("")
  document.body.style.background = hexcode
  document.getElementById("title").innerHTML = hexcode
  document.getElementById("copy").style.color = "black"
}

function copy() {
  const copyText = document.getElementById("title").innerHTML
  navigator.clipboard.writeText(copyText)
  document.getElementById("copy").style.color = hexcode
}