Flutter BoxDecoration’s background color overrides the Container's background color, why?

Container’s color is shorthand for BoxDecoration’s color, so BoxDecoration's color in the Container's decoration property overrides its Container's color.

Problem:

You can't use color and decoration at the same time. From docs:

The color and decoration arguments cannot both be supplied, since it would potentially result in the decoration drawing over the background color. To supply a decoration with a color, use decoration: BoxDecoration(color: color).

Solutions:

• Use only color:

  Container(
    color: Colors.red
  )
  

• Use only decoration and provide color here:

  Container(
    decoration: BoxDecoration(color: Colors.red)
  )
  

The color and decoration arguments cannot both be supplied, since it would potentially result in the decoration drawing over the background color. To supply a decoration with color, you can use the below code.

decoration: BoxDecoration(color: Colors.red).