Milo is a spiffy blogging theme for Tumblr with slick transitions and plenty of customization options. Milo comes with seven pre-built color schemes to instantly change your blog’s “look and feel”, but you can of course override those colors to create a bespoke palette that’s all your own.
Demo: http://themeforest.net/item/milo-a-blogging-theme-for-tumblr/10050509