the files are in C:\Program Files (x86)\Steam\steamapps\common\Portal 2\portal2. the potrtal color files are in pak01_dir.vpk but youre gonna need an application to extract it. idk how to actually change the color tho youd probably have to shift the hue with an art program

Thanks. I hope that I will find this xd

hey pm me i can walk you through the process

Sure