If you have an e-commerce site, are there particular colors you should want to have in your site to "stimulate" the visitor into spending more money with you, or make them more impulsive to purchase from you?
Interesting question! What I know is that a common scheme for sales sites is that every page has one central "call to action" in a colour that stands out. For example, a red-and-black colour scheme page informing about a product group and a small banner in green saying "click here to order product X". From what I have seen, this plays with contrasts rather than specific colours.
Being a fan of empirically gathered evidence, I recommend you the following as my final reply: Use CSS to test three or four different colour schemes on your specific target groups. You can randomise the colours for each user and then measure the conversions your reach. You might have to run this for a few weeks, but by the end, you will know if there is a significant difference.