[PlexyIT]

I wonder if there is a way to change the background color of the lookup window.
When I press the combination keys [CTRL + L], it opens a lookup window that give the possibility to do a research on a google dictionary or on a google search or on wordnik page. But all these kinds of window are always with a white background color. Is it possibile to change it somehow in a specific color? If Yes, how can I do it? I hate white color, because it cause me eye fatigue. I'd like to change in sepia light for example, my favourite color, or other different colors.