The method is as follows:
1. Right-click the desktop and select "Personalize" in the pop-up shortcut menu;
2. Select the "Window Color" operation interface in the pop-up window. Select the Advanced Appearance Settings below;
3. In the dialog box that appears, select Project-Window-Color-_-Other Setting Colors;
4. Set hue to 85, saturation to 123 and brightness to 205, and then click "Add Custom Color" button;
5. Click "OK" all the time to exit.