use the “admin_print_scripts-plugins.php” hook:
function add_scripts_to_plugins_page($hook) {
// register and enque plugins.php stylesheets here
}
add_action( 'admin_print_scripts-plugins.php', 'add_scripts_to_plugins_page' );
or use get_current_screen() to get the current admin page:
add_action('admin_enqueue_scripts', 'add_admin_stylesheets');
function add_admin_stylesheets() {
global $my_admin_page;
$screen = get_current_screen();
if($screen->id == 'plugins') {
// register and enqueue stylesheets here
}
}
and register and enqueue your stylesheets: https://codex.www.ads-software.com/Function_Reference/wp_enqueue_style