'Looks like a RaisedButton'

),

The OutlineButton style for OutlinedButton is a little more
complicated because the outline’s color changes to the primary color
when the button is pressed. The outline’s appearance is defined by a
BorderSide and you’ll use a MaterialStateProperty to define the pressed
outline color:

final

ButtonStyle

outlineButtonStyle

OutlinedButton

styleFrom

primary:

Colors

black87

minimumSize:

Size

88

36

),

padding:

EdgeInsets

symmetric

horizontal:

16

),

shape:

const

RoundedRectangleBorder