[Princeton]

I'm guessing you are using png files. If so - make sure that the browser supports png.

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To blend with the body, your image must be positioned properly within it's block.

Let's say you have a table cell with white background and you want to blend the color blue to it ... top (blue) -> bottom (white).

Create an image that blends blue->white.
Don't worry about adding "opacity". It will not be needed if you blend it when editing it.

Now, you can position the background image to the top of the cell by using the following style:

background:#ffffff url(bluegrandient.png) top left repeat-x

Make sure the table cell has a white background color.