Staring at all those flashing pixels on your computer screen all day is not only putting strain on your eyes, causing you headaches, muscle fatigue, but it might also be effecting your portfolio performance negatively. So selecting the right background colors on your computer screen is very important not only to your physical health but also to the health of your trading account performance. For example, many studies have found that the yellow color has more calm effect on the human psychology, that is why you find that most metal health wards is painted with a yellow color, also studies have found that the red color makes the person more aggressive in his actions. Therefore, I think as trader, it is very important to select the right screen brightness and chart background colors to be in harmony with you room surrounding and trading style. Does that make sense?