I've looked at a few models and I don't think either one is going to work for me. I'm modifying a theme and want to put a top-to-bottom gradient in the sidebar, and I want it to go all the way to the footer. I am pretty sure if I wanted to get a solid to the bottom, I could use an image or the right width and use "repeat-y" to get it to the bottom. I found a template that uses a gradient to the bottom, but uses "containers" which my template does not, and I suspect that is what helps it fill out to the bottom. When I changed the background on my sidebars, it only worked to the bottom of the text.
I could probably manage it with a left-to-right gradient by doing the repeat-y, but I'd wanted to do a top-to-bottom. Or at least know how to. Thanks.