PoveroBox img -webkit-filter grayscale 100 filter grayscale 100 -webki

.PoveroBox img {
	-webkit-filter: grayscale(100%);
	filter: grayscale(100%);
	-webkit-transition: .3s ease-in-out;
	transition: .3s ease-in-out;
}
.PoveroBox:hover img {
	-webkit-filter: grayscale(0);
	filter: grayscale(0);
}