Back in the '70s I was a graduate student in psychology. One of the areas I was really interested in was the power of colors to elicit emotion. Unfortunately, there weren't any real studies on this at the time. But in the years since, a lot of work has been done in exploring the relationship between color and emotion.
Research shows that 90% of information transmitted to the brain is visual, and visuals are processed 60,000 times faster in the brain than text.