And depending on which message you wish to convey, the colors you choose can either support, emphasize, or contradict your message. Blue tones are their dominant colors. In the case of surgeons and dentists for example, pain makes people nervous and blue therefore helps to calm them down. In short, remember that blues tend to signify logic while reds equal emotion. However, keep in mind that you can use both colors, depending on your goals or theme.
Villains often appear in dark reddish colors while heroes are in lighter bluish tones.
Take the example of the latest Star Wars movie. For example, my site is dominantly blue. While pink is a reddish tone, it was used in this case to excite people about the potential changes in one's appearance. Self-esteem and beauty are emotions. And cosmetic surgery is more often than not an emotional choice.