Switch to control 3 separate outlets?

As @Automated_House mentioned, any switch, including a battery operated switch, which communicates with the SmartThings hub can then be used to control any group of devices which are also controlled by the smartthings hub. The switch send a message to the hub, the hub sends a message to as many different outlets as you told it to. So that part is easy. :sunglasses:

You still need one device per outlet to let the outlet itself talk to the smartthings hub. If these are regular 110V outlets, you will have a lot of choices for on/off. If they are specially made for LED strips and are 12-24 V you’ll still have a few options.

To change the color, most people would either mount a small WiFi phone that had a color dial on it or is a multi button switch to let you change to different preset scenes. There’s one popular battery operated device which has eight buttons each of which can do tap, double tap or long hold, giving you 24 scenes for one light switch size device, but there are a lot of other choices as well.

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This first link is the list of all the button devices. This includes both battery operated and mains powered and both handheld and wall mount so read the descriptions carefully. But you’ll see there are a lot of choices. :sunglasses:

As far as 110 v outlet choices, US code requirements mean they all end up being very similar with the exception that older models generally only have one of the two sockets which is controllable from the network and as of 2017 we are starting to see a few models come out which can control both sockets.