1) Change the previous code to
.woocommerce-main-image img, .etheme-sticky-cart .attachment-post-thumbnail, .content-product .product-content-image img, .single-product .swipers-couple-wrapper .swiper-wrapper img { background-color: #F8F8F8; }
2)
.pswp__button--close { color: red; }
Regards
