Most sunset lamps are designed to automatically change colors over time, mimicking the colors of a sunset. However, some sunset lamps may allow you to adjust the color settings manually. To do this, you will need to consult the instructions that came with your lamp to see if this is possible and how to do it. In general, you can change the colors on a sunset lamp by using the controls on the lamp itself or by using a remote control, if it comes with one. Some sunset lamps may also be able to be controlled using a smartphone app. To use the app to adjust the colors on the lamp, you will need to connect the lamp to the app as described above.