There is a small white controller underneath the right side light strip with 3 button "nubs". The middle button scrolls changes speed, the top and bottom buttons are up/down. There's 70 different light modes. Some have solid colors (incl. White).
*If you have a V2 version book machine with only white lights, you can now purchase an multi-color light upgrade kit. Its fairly easy to install. Click HERE for more info.