Hello,
1/ Add the next code in Theme Options > Theme custom CSS:
.widget_product_categories.sidebar-widget ul li .current-cat a, .sidebar-widget ul li .current-cat a {
color: yellow;
}
2/
.quantity-wrapper .et-icon {
color: yellow;
}
div.quantity>span, div.quantity>input[type=number] {
border-color: yellow !important;
}
Regards