For the color control, there isn’t really any obvious choice. If there’s a specific set of scenes that you want to rotate between, there are some nice multibutton or multifeature switches that can give you a lot of choices. For example, the following eight button battery operated device actually gives you 24 options because each button can be press, double press, or long hold.
But there are some other choices as well. See the following list:
Alternatively, some people just get a $20 Wi-Fi phone and use that as a wall mount. Then you can get a nice color wheel on it just using the regular SmartThings app.