San Fran is a free, minimalist WordPress blogging theme which focused mainly on typography and content. It provides you clean and simple interface with several different color schemes you can choose from.
Install and activate San Fran. Upon activation you can change its color scheme from Dashboard -> Appearance -> Theme Options page. It provides you various other features like you can add you own custom CSS, you can add a custom Footer Note direct from its options page without editing footer.php.
Other than this you can dsplay tags and categories in full. By default San Fran settings do not display tags and display categories in a more visually appealing way. You can enable this option to revert back to displaying tags and categories for posts in full.