I was thinking that the armour in the n-star shop should be a different colour to signify that this is different from just regular armour and I propose that the colour of this armour be changed to the colour of the middle of an end portal. This is just my opinion and it would be understandable if this is too hard to create. Well thanks for reading, Nutty_Cole
This can't be done by the server, without a mod being installed on every client connected to the server. The game isn't going to know the difference between 'star armour' and any other enchanted diamond armour, as far as the server and your client is concerned it's diamond armour with certain enchantments. This means it can't be done with a server texture pack, even if it was possible with a texture pack the server can't force everyone to use that texture pack.