Thanks Kyle.
Finally it worked and get rid of the grey background, but I needed to add it to the Custom CSS/JS section. Don’t know why.
Just adding your code to my style.css on my child theme wasn’t enough..
(I already had this on my style.css in the child theme)
.woocommerce ul.products li.product a img, .woocommerce-page ul.products li.product a img {
box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.3);
display: block;
height: auto;
margin: 0 0 8px;
transition: all 0.2s ease-in-out 0s;
width: 100%;
}
.woocommerce ul.products li.product-category .product-cat-info {
background: none repeat scroll 0 0 #FFFFFF;
bottom: -35px;
padding: 10px;
position: absolute;
text-align: left;
}
.woocommerce ul.products li.product a:hover img, .woocommerce-page ul.products li.product a:hover img {
box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.4);
}
.woocommerce ul.products li.product-category .product-cat-info .count {
display: none;
}
.woocommerce ul.products li.product-category .product-cat-info:before {
display:none;
border-bottom-color: #FFFFFF;
}
Thank you very much for your help!