[mksmns1126]

How to permanently change background color?

PSP background change on monthly basis, however you can make it stay with only one background color. This trick is only applicable with Version 2.0 firmware,
1. Go to Settings > Theme Settings, hit the X button, select Theme, hit the X button again
2. Select a color from the menu that is shown on the right. The colors will change when you select any options in the list. However if you choose Original, then the color will change each month. Then select the X button to make your selection and your PSP will permanently have one background color.

PSP background color by month