step 4 - get (colour you want the armour to be) dye and, with the dye in your hand, tap the cauldron a few times. the water in the cauldron should be (colour you chose) now. you can also mix colours if ya want
step 5 - with your helmet/chestplate/leggings/boots in your hand, tap on the cauldron.
and now you have coloured armour ._.
step 5 - with your helmet/chestplate/leggings/boots in your hand, tap on the cauldron.
and now you have coloured armour ._.
to get coloured armour on single player worlds:
step 1 - get leather armour
step 2 - get a cauldron
step 3 - fill the cauldron with water