Try to add the following code snippet to the Custom CSS area for mobile devices in Theme Settings to do this

.color-scheme-light .basel-product-categories {
    background-color: white!important;
}

.color-scheme-light .basel-product-categories li .children {
    background-color: rgba(0,0,0,.1)!important;
}

.color-scheme-light .basel-product-categories li .children:before {
    color: rgba(0,0,0,.1)!important;
}

.color-scheme-light .basel-product-categories li a {
    color: #1aada3!important;
}

.color-scheme-light .icon-drop-category:after, .color-scheme-light .icon-drop-category:before {
    background-color: #090909!important;
}