Do you want a colour fade from one dark to light colour as a static background (say black at the top down to white at the bottom) or do you want the colours to continually fade from one to another and then yet another ?
For a static table/cell background fade, try pasting this code into your page:
<table style="filter:progid:DXImageTransform.Microsoft.Gradient(endColorstr='#ffffff', startColorstr='#ccffcc', gradientType='0');"><tr><td>Table content text goes here<br><br>and maybe some more can go in here<br><br>........</td></tr></table>
Alter the colours and text to reflect your preferences.
If you want continually changing colours, post again and I'll get back to you later today.