I guys....another dumb question

Actually i put the custom 1.1.0 firmware with 5.1.1 android (from pcristi i guess)
I dont like the icons in home screen ,are all White (in the original firmware are coloured)
And i like to toggle the skype icon and es file explorer icon (cause i dont like and i want to change file
Manager...)
Is it possible or not?
And maybe if i put back the original firmware....is it possible to change homescreen?
Thanks for answer