atlassian-cloud-dark.user.css

/* ==UserStyle==
@name         Atlassian Cloud Dark
@description  Dark theme for the Atlassian's cloud offerings
@namespace    pblew.dark-themes
@version      1.0.3
@author       Paul Blew <paul.blew@gmail.com> (https://github.com/pblew/dark-themes)
@homepageURL  https://github.com/pblew/dark-themes
@supportURL   https://github.com/pblew/dark-themes/issues
@license      CC-BY-4.0
@preprocessor default
==/UserStyle== */

@-moz-document domain("atlassian.net"), regexp("^https?://.*bitbucket\\..*"), regexp("^https?://.*jira\\..*"), regexp("^https?://.*confluence\\..*") {
    html:not([stylus-iframe]) > body {
        background-color: black;
        filter: invert(90%) hue-rotate(180deg);
    }
    img, span[role=img] {
        filter: hue-rotate(180deg) invert(90%);
    }
}