I see alot of posts from the design perspective but what is your brand trying to convey? Who are your customers? The sure fire way is to generate lets say 20 schemes, get friends, family, and biz partners to vote on their top 5. Get a collection of top 3-10 color schemes and show them to possible customers. Take their input and there you have a color scheme that has a high likelyhood of working for your target market. Attractiveness does not equal branding good, ex this famous brand: http://www.arrogantbastard.com/