I made a mod where every gun and is changed with the wielder's beam color. This is purely cosmetic and changes no mechanics. You have to download the file and replace the original resources.assets file with this one. I suggest holding onto the original file if you ever want to change it back.
https://drive.google.com/file/d/166WKCMgkWY8ME3hyKponju8ODKv1wK4u/view?usp=drive_link