Build a simple custom theme – Part 1
Step 8: Last few tweaks
If you made it this far, you’re probably a whiz now and you know what to do.
The styles for the sidebar need to be adjusted as do the comments and the footer. No changes to the templates are needed other than in the style.css. So go ahead, modify these and you can use the CSS of the the final theme to look at how I went about it.