In the drain, Cinnamon looks inconspicuous. What can a well-developed author's theme in bright colors do? - Turn the working environment into a real candy. The "Sandbox" theme resembles the Chrome OS interface. Bright abstraction on the desktop, as well as beautiful white windows and elements. Additionally: a contrasting red shade for active elements. If desired, it can be replaced with green or blue. Exactly like the white color for windows can be replaced with black. The author provides a video on the detailed configuration of his brainchild, which will be useful for novice users.