Hi,
I need your help but firstly I will try to describe my situation 
These are my lights. I have standart wall switch connected to shelly smart switch and than to light.
Why? Because I wanted to have standart looking wall switch and if something goes wrong with HomeAssistant server, lights still works and you can controll them through wall switch.
How to make card:
on click you controll switch.shelly
background color is by color temperature of light.ikea_bulb
and have two slider(brightness and color temperature of light)
Do you have any ideas?
Thank you so much