a value of color can't be assigned to a type color-CodePudding

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I am getting an error how can I solve this.

CodePudding user response：

You need to replace Colors.indigo[900] with Colors.indigo[900]!:

Color bgColor = data['isDayTime'] ? Colors.blue : Colors.indigo[900]!;

Color.indigo is a MaterialColor and the returned type of the operator [] on a MaterialColor is Color?. It means it can return a Color, but also null.

If you know that Colors.indigo[900] is not null. Then you can use the null check operator (!) to tell dart that you know the variable Colors? Colors.indigo[900] is not null and it is in fact a Color.