You can enable sidebar & widgetized footer, choose sidebar position (left or right) individualy for all pages, including portfolio, gallery and all other post types.
All sidebar & footer colors are customizable from the Theme Options panel. Moreover, you can fine-tune nearly all dividers, paddings and sizes.
Theme comes with 14 custom widgets. All standard WordPress widgets look and work perfectly as well. The7 also has high compatibility with third-part widget plugins.