The way i have designed my theme it should be easy to change the colors (incl. a darkmode) and how round the avatar is to the pod operators liking by editing the vars in https://git.mills.io/yarnsocial/themes/src/branch/master/copenhagen/static/css/99-yarn.css
But there should be noting broken, just minor adjustments to be made by the community, so I see no reason why we should not at least try to make it the main theme here on twtxt.net - That is why I been working on it for the last year almost.