lighter method

Color lighter(
  1. int percents
)

Make color lighter by so many percents

Implementation

Color lighter(int percents) {
  assert(percents >= 1 && percents <= 100);
  final int rgbPercent = (percents / 100 * 255).round();
  int red = this.red + rgbPercent,
      green = this.green + rgbPercent,
      blue = this.blue + rgbPercent;
  if (red > 255) {
    red = 255;
  }
  if (green > 255) {
    green = 255;
  }
  if (blue > 255) {
    blue = 255;
  }
  return Color.fromARGB(alpha, red, green, blue);
}