I like everything about the skin called Modern except the backround with the multicolored bubbles. You told me in a previous post to modify the stylesheet. But all that did was change the entire backround. The Modern skin seems to have two backrounds so to speak. One smaller black backround that frames the post, which appears to be slightly opaqe. Then there's a larger backround with the multicolored bubbles that seems to be visable behind the smaller backround.
I would like to replace the bubbled backround with a picture (or a solid blue color) and would like the second backround to not be opaque because I don't want the picture backround to show through.
How do I do that?