lighter method
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);
}