Aha! You say. You cannot change colour, only with a lot of drugs.
Aha! I say. It's easy to change colour, I do it almost every day. It's easy.
Yesterday I was wearing red trousers and a red shirt. And today? Big change! I'm wearing blue trousers and a blue shirt. Now, wasn't that easy? Or fairly easy?
I'm sure if you practise, you can do it too.