RED

Positive associations: Excitement, youthful, bold, love, take action, passion, romance

Negative implications: Stop, danger, warning, pain

Since red is such a powerful color, it must be used with care when branding. For example, athletes up against opponents wearing red are more likely to lose, and students tend to perform worse on tests if exposed to red beforehand. Red, after all, is the color of stop signs, grammatical mistakes, and negative finances.  

The color red also incites action.  Therefore, you will often times see it used as an accent color on websites call to action buttons.