So I've been using the Philips "The One" TV (55pus7304/12) for a few months now with Androit TV and i love it. The TV is amazing, 4k, HDR+, what ever floats your boat (apart from oled lol).
To get to the point, the tv uses the Ambilight feature from Philips as it has built in LED stripes at the back of the tv. If the TV is turned off, you can turn on the leds with the remote but only with a handfull of preset colors.
Sooo since Ambilights are LEDs and is able to produce almost any color you want, i was curious if there's maybe an App for Android TV where you can control and customize the color/brightnes (maybe timer) of the LED stripes.
So far I havent found anything on the Play Store yet and the Philips customer service was less helpfull.
Is this the kind of thing you are looking for?
https://play.google.com/store/apps/details?id=com.sevson.androidambiapp