book/scripts-greasemonkey/fix_input_dark_theme.user.js

// ==UserScript==
// @name        Fix Input Dark Theme
// @author      Jesús E. & Enmanuel E.
// @namespace   fixForMyDarkTheme
// @description Scan all inputs and add a inherit color option for not blind inputs in your dark theme
// @homepageURL https://git.sr.ht/~heckyel/book/blob/master/scripts-greasemonkey
// @include     *
// @grant       none
// @version     0.0.2
// @license     GPL version 3 or any later version::: https://www.gnu.org/licenses/gpl-3.0.html
// ==/UserScript==
/* jshint esversion: 6 */

function fixForMyDarkTheme(){

  const consoleCSS = 'background: #000; color: #00FF00; padding: 0px 7px; border: 1px solid #00FF00; line-height: 16px;';
  const name = GM_info.script.name;
  const version = GM_info.script.version;
  const log = (...args) => console.log('%cUSERSCRIPT | %s %s | %s', consoleCSS, name, version, ...args);

  log('successfully initialized');

  let i, inputs;
  inputs = document.getElementsByTagName('input');

  for (i = 0; i < inputs.length; i++) {
    inputs[i].style.color='inherit';
    log('fixed input');
  }

}

fixForMyDarkTheme();
// ohm ... m(-_-)m ... thanks