Gradient in Body Background

There is nothing spectacular about this gradient as far as I can tell. Then, it may be my eyesight. The body element of this page is supposed to have a 30 degree gradient, dark at the top left corner, fading to the bottom right.

Hold on. I think the key is being sure that the DOCTYPE is html5 and that the amount of text is large enough to fill the screen. If it doesn't, the shading only impacts the part of the window that has text.

This current version has two repeats of the body gradient.

Link to failed version.
Source