Feng Shui According to Colour?

I come across a few websites that stated about feng shui colours. Is there really such a thing? I mean does colour really affects feng shui? Or was it just some sort of mood changing thing when you look at a particular colour... so then it is considered as feng shui? What does feng shui really means then? Maybe colours does affect one's mood but colour feng shui, how is that explainable?