Different Admin Themes for Multisite

gistfile1.txt

//Different Admin Themes for Multisite
add_filter('get_user_option_admin_color', 'change_admin_color');

function change_admin_color($result) {
//site 1 --->
  if(get_current_blog_id() === 2) {
    return 'sunrise';
  }
//site 2 --->
  elseif(get_current_blog_id() === 4) {
    return 'ectoplasm';
  }
  //site 3 --->
    elseif(get_current_blog_id() === 5) {
      return 'default';
    }
  else {
    return $result;
  }
}