Use APKPure App
Get AlphaHack Mod old version APK for Android
You will be able to change the background color.
Cheat mod AlphaHack you can play with it as in single player and on servers MCPE. There is a lot of functions in ModPE. Alpha hack will be helpful even for those players who do not particularly like the cheat function. You will be able to change the background color and take advantage of other entertainment features.