Built as a Chrome extension, this can be used just with its CSS if you so prefer. In short, it makes a few tweaks to the Roll20 UI, most notably the addition of a wooden background (and a Ring surrounded by the ring poem, although that is easily removed for more generic fantasy use), although it also fixes a few of my pet peeves with the interface overall.

While I like the official The One Ring logo (the character sheet makes use of it), I thought it was too distracting on this background; and I wanted to also leverage my players' knowledge of the films, as opposed to the system itself, which none of them knew.

Feel free to cannibalize it; the assets are all free.

Available on Github (Custom Chrome Extension) or as a User Style (Firefox, Chrome).