Why I designed my blog this way?

Everything has a reason. About a year ago I saw a report witch say that you can save energy if you use Blackle instead of Google. Blackle is a page designed in black to save energy, and now I try to apply this philosophy when I can.
I copied the new:

Blackle was created by Heap Media to remind us all we need to take small steps to save energy in our daily lives. Blackle searches are supported by Google custom search.

Blackle saves energy because the screen is black by default. "Image displayed is primarily a function of the color settings and desktop graphics, as well as the color and size when you open Windows applications, some monitors require more power to display a white screen (or light) that a screen black (or dark). "

In January 2007 the publication of a blog called Black Google could save 750 Megawatt hours per year proposed the theory that a black version of the Google search engine could save some energy, because of the popularity of it. Since then there has been skepticism about the importance of saving energy and what it can achieve in terms of cost and readability with a black web page.