Readers seem to prefer black, grey, or navy type. I have read that visitors do not respond as positively to black pages. Too depressing, I suppose. And also I believe that pages should flatter clipart not detract from it. Sometimes white just seems to be the best choice for those bloggers who include many photographs in their posts. Play around with color. Most blog software will allow you to change the color of your web pages minutely if you should so desire. There are also many new free blog templates available on the web that you can upload onto your old blog to give it a bit of a face lift.