Okay so if I am understanding you correctly you want your page to shift from one color to another? Well if you want the color to continually change you can use a 1px wide gif image. Use a image editor and make the variation of colors you want during the shift and then use http://picasion.com/ to make it into a gif. Then just do like rcobb3 said.
Just to clarify what I mean by “Use a image editor and make the variation of colors you want during the shift and then use http://picasion.com/ .”
picasion.com compiles multiple images into a gif image. So make multiple images of the colors you want for the fade to and from the final color. Where ever you put this image the color will continually shift.
Here is a code generated by picasion, I used 5 jpg images to generate the affect. You can also just save any image you generate to you computer. There is a max number of images that you can use. Picasion has a 10 image limit. I don’t have Photoshop or anything so one of the image creators may have a similar function.