toHex method

String toHex({
  1. bool leadingHashSign = true,
  2. bool includeAlpha = false,
})

You can customize the output by setting leadingHashSign to include or omit the '#' symbol. You can also include the alpha (transparency) value in the hex string by setting includeAlpha.

Example:

Color color = Color(0xFF42A5F5);
String hex = color.toHex(); // Output: #42A5F5
String hexWithAlpha = color.toHex(includeAlpha: true); // Output: #FF42A5F5

Implementation

String toHex({bool leadingHashSign = true, bool includeAlpha = false}) =>
    '${leadingHashSign ? '#' : ''}'
    '${includeAlpha ? a.toInt().toRadixString(16).padLeft(2, '0') : ''}'
    '${r.toInt().toRadixString(16).padLeft(2, '0')}'
    '${g.toInt().toRadixString(16).padLeft(2, '0')}'
    '${b.toInt().toRadixString(16).padLeft(2, '0')}';