How do I color white powder? And how do I add scent?

Question

Hello good Morning.

In my country they "make 2-CB" (false with Ketamine and LSD) and I would like to know how they color the white powder with strong and showy colors.

I also want to know how they add the smell since I tried and there is just orange, chewing gum, etc.

Thank you very much, I look forward to a quick response.