Inkwell.hover constructor
Implementation
factory Inkwell.hover(Color color, [int alpha = 100]) {
return Inkwell()
..splashColor(color, alpha ~/ 3).highlightColor(color, alpha ~/ 3.5)
..hoverColor(color, alpha).overlayColor(color, alpha ~/ 5)
..focusColor(color, alpha ~/ 3);
}