fromHex static method
String is in the format "RRGGBB" or "AARRGGBB" with an optional hash sing "#".
Implementation
static Color fromHex(String hex) {
final buffer = StringBuffer();
if (hex.length == 6 || hex.length == 7) buffer.write('ff');
buffer.write(hex.replaceFirst('#', ''));
return Color(int.parse(buffer.toString(), radix: 16));
}