It totally is, but this value isn't changing too often so I'm not that concerned. The problem is that there is no way to natively share variables between CSS and JS. 

Chris Coyier has an [interesting method](http://css-tricks.com/making-sass-talk-to-javascript-with-json/) of using SCSS to generate a json serialized object as a data-attribute to share SCSS variables with Javascript. Problem is that pure CSS doesn't have these variables, so even if I were to use this technique, I'd still have 7s floating around in CSS. 

Ideally I want to redo the CSS for watchtower using SCSS, but right now its not worth it, especially since it'd add an extra installation step which i'm not keen about (could make installation fragile).

For now, I'd say just keep the comment.