L'Oreal ParisColorista Semi-Permanent Hair Color For Brunettes, Burgundy

Are you supposed to throw it out after it has been opened, like most hair dye? Or is this good for multiple uses?

Could i mix two of the colors...for example the peach and the light pink together? I am looking to get a nice rose gold shade

My hair is very long, will it contaminate my clothes after I color my hair？

I have long hair. It goes about halfway down my back. Should I get two packages or one?