One Two Three is a free Tumblr theme that comes with a highly gorgeous grid look. This theme has been designed for photo lovers and photobloggers who love to share their photos with the world. This theme supports all types of posts on your blog without special focus to any particular type. You can also set up Disqus comments using this theme and let your users make conversations in the comments section. This theme comes with a mobile-first design, which makes it fully mobile-friendly. With this theme, you can also customize the colors and background images. Not to mention, this theme also comes with social sharing options and social media links that are embedded in social media icons.