Hi for this work log i dont have picture. but i put all in a video check out below most part of hue led i used addressable LED ws2812b and attiny85 or aduino nano. the got pretty big sample and library on internet. Final pic The led behind the screen is sync to real time according to screen color.
Search for Ambilight projects. Some RGB addressable leds, arduino and hdmi grabber usually. Not hard to do and it looks awesome.
CORRECT !! other word is adalight. i use USB sending signal from pc to arduino. so no need complex hdmi processing like rasbery pi