Grouping RGB bulbs, controlling multiple RGB bulbs with one Tile

Updated July 2021.

1. Create a Simulated RGB Bulb, it will the the master bulb for the group. Alternatively, you may chose to designate one of the existing RGB bulbs as the master
2. In SmartThings mobile app select Automations, tap +, select Add SmartApp, select Color Coordinator
3. Select the master RGB bulb as the Main Light
4. Select other lights that will follow the master

Now, the master bulb can be added as a Tile! It will control all RGB bulbs in the group.