highContrast function
Implementation
Color highContrast(Color input) {
final grey = 0.2126 * math.pow(input.red / 255, 2.2) +
0.7151 * math.pow(input.green / 255, 2.2) +
0.0721 * math.pow(input.blue / 255, 2.2);
Color output = Colors.black;
if (grey <= 0.18) {
output = Colors.white;
}
return output;
}