currently there is no dark theme but I was messing around with tampermonkey browser plugin and this little bit of script will make it dark(ish) until an official option by admin is available. its just a luminance inverter so things look a bit odd
// ==UserScript==
// @name infinity free cpanel invert colors
// @description
// @version 1
// @grant none
// @match *://cpanel.infinityfree.com/*
// @grant none
// ==/UserScript==
(function () {
const style = "html { filter: invert(1) hue-rotate(180deg) }{-webkit-filter: invert(100%); -moz-filter: invert(100%); -o-filter: invert(100%); -ms-filter: invert(100%); }";
const head = document.getElementsByTagName("head")[0];
const styleTag = document.createElement("style");
styleTag.type = "text/css";
if (styleTag.styleSheet) {
styleTag.styleSheet.cssText = style;
} else {
styleTag.appendChild(document.createTextNode(style));
}
head.appendChild(styleTag);
}());