Here is how to add scripts to the head section of your html in order to apply a custom theme color, call independent scripts, and even create a pwa

locate this section of code in your app.js file, which in appgyver web build is app(some long sting).js, under next/static/chunks,pages:

function d(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],t=[a.default.createElement("meta",{charSet:"utf-8"})];return e||t.push(a.default.createElement("meta",{name:"viewport",content:"width=device-width"})),t}

add new items to it like this:

function d() {
  var e = arguments.length > 0 && void 0 !== arguments[0] && arguments[0];
  var t = [
    a.default.createElement("meta", { charSet: "utf-8" }),
    a.default.createElement("meta", { name: "viewport", content: "width=device-width" }),
    a.default.createElement("meta", { name: "theme-color", content: "#000000" }) // Add this line for the theme color
  return e || t.push(), t;

in this case i added the “theme-color”, which makes the browser on chrome and a few other browsers change to the color you specify. you can also create a script to update the theme when your app changes from dark mode to light mode, and many other things.

which if you only add it to the html pages, this script overwrites it. it is in this manner they try to suppress you from being able to build custom products.

you can make the theme-color update so that it will be light for a user who uses light theme and dark for a user wo uses dark theme by setting the value of your darkMode variable to local storage when changed and creating a js file in the root of your web build, for example themeScript.js and include this code

document.addEventListener('DOMContentLoaded', function() {
    function updateThemeColor(color) {
      var metaTag = document.querySelector('meta[name="theme-color"]');
      if (metaTag) {
        metaTag.setAttribute('content', color);
    function handleDarkMode() {
      var darkMode = localStorage.getItem('darkMode');
if (darkMode === 'true') {
        console.log('darkMode'); // Set the color when dark mode is enabled
      } else {
        console.log('lightMode'); // Set the color when dark mode is disabled
    window.addEventListener('storage', function(event) {
      if (event.storageArea === localStorage && event.key === 'darkMode') {

If you want it to update immediately you have to get the script into the next.js react dom. i will play with it and see if I can do it later

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Thanks a lot for the tip, friend! The whole community thanks you.

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sorry just now getting your reply. no problem i remember someone was asking about this a while ago