green stars

Just considered something very interesting. As I was reading the amazing wikipedia article about redshift, I noted the little visual demonstration of colour shifts. They show a yellow ball changing colour. When moving toward the observer (at a speed of 5200 km/s), it changes to a green colour; when it recedes, of course, it turns orange. I thought of double stars and some of the crazy colour descriptions. Could this be another explanation for green stars? Perhaps some of the green stars noted are ones moving toward the Earth...