Colors have an enormous importance in web design. According to Kissmetrics, when you view a color, your eyes communicate with a region of the brain known as the hypothalamus, then, in turn, it will send a signal to the pituitary gland and finally to the thyroid gland. This signals the release of hormones that cause fluctuation in mood, emotion, and resulting in behavior. Interesting, isn't it?
Also from Kissmetrics, research has shown that it takes just 90 seconds for a site visitor to form a judgment or opinion. Further to that, 62-90% of that interaction is determined by the color of a product alone.
You should now understand why colors are extremely important and why it's crucial to choose them in the right way, at the right time, with the right audience, and with the right purpose.