Dynamic Text formatting MX04

I have a text field that is dynamic, I am using html coding to format the text to make it look the way I want it too. I also have a scroll bar for this text. Is there any way for the background of the text field to be translucent, so that I can see my graphic behind it and just have the text sit on top. Right now when I try this, it gives me a white text box backgroud, I don’t want any color at all.

Thanks for you help