I'm looking for a description of properties such as colour and spin. Because we are warned these words do not describe the reality of the particles. i.e. an electron is not 'spinning' up or down. They are just handy words. Labels. So quarks are not 'up' or 'down'. When I read that electrons moving through a particular magnetic field are deflected either up or down then I understood all that I wanted to know. I'm looking for similar simple explanations of what experimentalists have found that led them to eventually give these labels. Do I make myself clear? I realise I maybe don't. I just want that little bit more background or explanation of things. Is there a place where I can read that?