Display advertising requires an adept use of imagery to gain viewer attention, so we are sharing this infographic from the Logo Company.  While this is meant as a guide for creating logos, the same rules apply when developing ad creative for banner ads. You have only a brief moment to get your point across.  Use colors wisely to evoke an emotional response in viewers. This will make your banner ad much more effective!
Color Emotion Guide22 Psychology Of Color In Logo Design

An infographic by the team at The Logo Company