I have searched for an answer but couldn\'t find it anywhere. My question is reasonably simple: I have a background color of my body, then a large margin, and now I want a d
That is not possible du to the Box Model. However you could use a workaround with css3's border-image, or border-color in general css.
However im unsure whether you may have a problem with resetting. Some browsers do set a margin to html as well. See Eric Meyers Reset CSS for more!
html{margin:0;padding:0;}