I also feel that it is a personal preference. The blue pulls the eyes further back and gives the impression of a larger field of vision and scope, while the black is bold, defining and keeping the eyes pulled forward and focussed on what is being displayed in front of you. Sort of like a box or display effect with the bold black blackground and blue hues expand the viewing area giving it an illusion of a larger viewing area due to the light which is reflected. Dark hues absorb light and lighter colors reflect percentages of light. It's all in how you want to display your
DT and what's in it.
