When the system uses a third-party theme, the background color of the specified program is set to the system default instead of following the theme. 系统使用第三方主题的环境下，将指定程序的背景色设置为系统默认 而不是跟随主题。 The third party theme here refers to the system with UX theme patch installed 这里的第三方主题指的是安装了UX破解补丁的系统