In the Special Edition of Using Microsoft PowerPoint 2002 there is a section on color. It states that color has an impact on your emotions.

They list several colors and give the suggested colors to use for different effects.

Their suggestion for the combination that is the easiest to read from any distance is dark blue backgrounds with yellow and white shadowed text. A consistent background color and template will add to your presentation. And be careful with colors, too many will make your presentation look like a circus.
What do colors represent to you? How do they make you feel/act? What combinations do you like the best? And, the standard line, "What is your favorite color?"

You forgot pink. It actually trigers love and sensitivity in humans.

Actually, colors by themselves, don't represent anything whatsoever. Its the meaning we attached to it over the years that makes us interpret them differently. We associate Pink with feminity, and white with purity and Black with ate, anger, evil, etc. because thats how people have done it over the past years. Indeed a lot of colors have two or more meanings attached to it, red could mean love, or it could mean danger. Similarly green could mean Safety, or it could mean envy.