in shared/java/Color.java [12:21]
public static int makeARGB(int a, int r, int g, int b) {
assert 0 <= a && a <= 255 : "Alpha is out of 0..255 range: " + a;
assert 0 <= r && r <= 255 : "Red is out of 0..255 range: " + r;
assert 0 <= g && g <= 255 : "Green is out of 0..255 range: " + g;
assert 0 <= b && b <= 255 : "Blue is out of 0..255 range: " + b;
return ((a & 0xFF) << 24)
| ((r & 0xFF) << 16)
| ((g & 0xFF) << 8)
| (b & 0xFF);
}