Change State when Value change

Use iRidium script to set the state

One way to do this is to create a feedback in Studio to store the colour state in, in this case it is Temp Colour
Then put a multi-state button over the text showing degrees, with colour blue for state 1, colour orange state 2 and colour red state 3

Add something like this script

//put in your driver name where it says "DriverName"
IR.AddListener(IR.EVENT_TAG_CHANGE,IR.GetDevice("DriverName"),function(name, value)
{
      //the name of the temperature feedback in this example is "Temp"
     if (name == "Temp") {
         //value is the current value of the Temp feedback
         if (parseInt(value) < 20) {
            IR.SetVariable("DriverName.Temp Colour", 0);
         } else if ((parseInt(value) >= 20) & (parseInt(value) < 25)){
            IR.SetVariable("DriverName.Temp Colour", 1);         
         } else  {
            IR.SetVariable("DriverName.Temp Colour", 2);
        }
     }
});