Philips can control on and off, but does not support color control. You can combine Philips Hue with other devices to form an activity, but you need to manually add lights that need to be turned on or off (Hue Bridge may have many lights, and you can set a specific light or group of lights that need to be turned on). If you have set it in the activity, it will also be turned on when opening the scene/activity in Alexa.