Calculate Lighter Shade of RGB

function getRGB(color) {
  if (
    (result = /rgb(s*([0-9]{1,3})s*,s*([0-9]{1,3})s*,s*([0-9]{1,3})s*)/.exec(
      color
    ))
  )
    return [parseInt(result[1]), parseInt(result[2]), parseInt(result[3])]

  if (
    (result =
      /rgb(s*([0-9]+(?:.[0-9]+)?)%s*,s*([0-9]+(?:.[0-9]+)?)%s*,s*([0-9]+(?:.[0-9]+)?)%s*)/.exec(
        color
      ))
  )
    return [
      parseFloat(result[1]) * 2.55,
      parseFloat(result[2]) * 2.55,
      parseFloat(result[3]) * 2.55,
    ]

  if (
    (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))
  )
    return [
      parseInt(result[1], 16),
      parseInt(result[2], 16),
      parseInt(result[3], 16),
    ]

  if ((result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color)))
    return [
      parseInt(result[1] + result[1], 16),
      parseInt(result[2] + result[2], 16),
      parseInt(result[3] + result[3], 16),
    ]
}

$('h1').css('text-shadow', function () {
  var rgb = getRGB($(this).css('color'))

  for (var i = 0; i < rgb.length; i++) {
    rgb[i] = Math.min(rgb[i] + 90, 255)
  }

  var newColor = 'rgb(' + rgb[0] + ',' + rgb[1] + ',' + rgb[2] + ')'
})