Corporate looking? Fun? Vibrant?
You will have to decide based on your:
1. Corporate colours - You will have to sychronise with your corporate logos and other marketing materials.
2. Target Audience - If your crowd is going to young people, then you should go for bright colours. If your crowd is going to be serious business people, then you should go with solemn colours like blue.
3. Objective of the site -If you are trying to sell something to web visitors, then you should make it colourful and vibrant to attract people.
For more ideas, please feel free to visit http://www.dewtouch.com/template