.button {
    background-color: darkblue;
    outline: 1px solid darkblue;
}

table {
	border: 1px solid darkblue;
}	

th {
	border: 1px solid darkblue;
	background-color: darkblue;
}

pre {
	border: 1px solid darkblue;
}
	
.grafiek {
	border: 1px solid darkblue;
}