comunicmobile/lib/utils/color_utils.dart

import 'dart:ui';

/// Color utilities
///
/// @author Pierre Hubert

String colorToHex(Color color) {
  if (color == null) return "";

  return color.red.toRadixString(16).padLeft(2, '0') +
      color.green.toRadixString(16).padLeft(2, '0') +
      color.blue.toRadixString(16).padLeft(2, '0');
}