strong {
color:#6C8C67 !important;
}

b {
color:#6C8C67 !important;
}

add_filter( 'astra_single_post_navigation', 'astra_change_next_prev_text' );
 
/**
 * Function to change the Next Post/ Previous post text.
 *
 * @param array $args Arguments for next post / previous post links.
 * @return array
 */
function astra_change_next_prev_text( $args ) {
    $next_post = get_next_post();
    $prev_post = get_previous_post();
    $next_text = false;
    if ( $next_post ) {
        $next_text = sprintf(
            '%s →',
            'Articolo Successivo'
        );
    }
    $prev_text = false;
    if ( $prev_post ) {
        $prev_text = sprintf(
            '← %s',
            'Articolo Precedente'
        );
    }
    $args['next_text'] = $next_text;
    $args['prev_text'] = $prev_text;
    return $args;
}