Comment by Liskni_si

> the background of body is still white for me

Had the same problem, changed "body" to "html", added background: #fff, now it works.

I turned it into a bookmarklet to make it easy to use on any website:

javascript:styles='html {filter: invert(1) hue-rotate(180deg) brightness(.9); background-color: #fff; }'; newSS = document.createElement('style'); newSS.type = 'text/css'; newSS.innerHTML = styles; document.documentElement.getElementsByTagName('head')[0].appendChild(newSS);void(0);