toJson method
Converts the DynamicColor object into a JSON map.
This method serializes the DynamicColor object into a format that can be sent or stored as JSON.
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['r'] = r;
data['g'] = g;
data['b'] = b;
data['opacity'] = opacity;
return data;
}