Wow had to edit that one.... I am really out of it today, if anyone read the post nefore i changed it then forgive me i was wrong.
Anyways. Plasma is not an atom without electrons it is a superheated ionized gas. So at least one electron was dissociated from the gas.
Because of this it is very electrically conducive, they interact independently, are electricallly neutral, and have a magnetism. Our tech that we have currently cannot contain plasma for more than a few seconds.
Technically u can change the colors by ading chemicals. Flame is a low temature partial plasma and if u throw salts into it: NaCl, KCl, LiCl, so on and so forth. They turn the flame different colors. I went out with some friends for my friends birthdays and we ordered a smores thing for her at the table. And after we were done and just chatting my geeky side kicked in and i changed the color of the flame by adding table salt.. Friends thought it was cool.
Anyway again i apologize for the wrong awnser earlier, my head is spinning, so it may seem all over the place.