function hexStringToRGB (hexString) {
  var r = (hexString.substring(1, 3)).toUpperCase()
  var g = hexString.substring(3, 5).toUpperCase()
  var b = hexString.substring(5, 7).toUpperCase()

  r = parseInt(r, 16)
  g = parseInt(g, 16)
  b = parseInt(b, 16)
  var obj = { r, g, b }

  return obj
}

console.log(hexStringToRGB('javascript rock !!'))