It looks to me that your background is set to green and your paragraph headers are set to the same color of green. You also appear to have a background image behind the table that your text is in. Text readers (what the search engines use to spider your site) don’t understand background images, so they are likely ignoring the fact that it is there. If that is the case, then they think the background for that table is green. My suggestion is to change the color of your green paragraph headers, or assign a background color to that table. The image should overrided the color you assign (i think). That should do the trick.