In the following example stylesheet, the button will appear blue instead of white after pressing on it and hovering away. In actual CSS this action works and the button appears white (https://jsfiddle.net/9pqn8g6b/).

#button{
	background: black;
}
#button:hover{
	background: blue;
}
#button:pressed{
	background: white;
}
#button:hover:pressed{
	background: red;
}