.wp-block-navigation-animation .wp-block-navigation-item a:hover:before, 
.wp-block-navigation-animation .wp-block-navigation-item .wp-block-navigation-item__content:hover:before {
    border-bottom-color: var(--wp--preset--color--primary);
    border-right-color: var(--wp--preset--color--primary);
}

.wp-block-navigation-animation .wp-block-navigation-item a:hover:after, .wp-block-navigation-animation .wp-block-navigation-item .wp-block-navigation-item__content:hover:after {
    border-top-color: var(--wp--preset--color--primary);
    border-left-color: var(--wp--preset--color--primary);
   
}