Many would call it a psychological factor but colors and visualization do have a bearing in the mind of any person. Such is what can be said from the Aurora Color Changing Clock which offers a large visual for the time and allows user to set the colors as they wish.
A little bit of work depending on how often you would set the color but something that you can look forward to when it comes to sleeping and waking up at the right time.
The Aurora Color Changing Cloc
