Update

home/apps/qutebrowser/duckduckgo-colorscheme.nix

@@ -0,0 +1,37 @@
+{ config, ... }: {
+
+  xdg.configFile."duckduckgo-colorscheme.js".text = ''
+    // Go to DuckDuckGo settings page, open the console, paste the code and hit enter.
+    // based on https://ddg.codingcodax.dev/
+    // Cookies string for your theme
+    const cookie = '7=${config.theme.colors.bg}; j=${config.theme.colors.bg}; 9=${config.theme.colors.fg}; aa=${config.theme.colors.alt-fg}; 8=${config.theme.colors.color7}; x=${config.theme.colors.primary-bg}; 21=${config.theme.colors.alt-bg};';
+
+    // Converts cookie string into formatted JSON
+    const cookieToJSON = (cookieRaw) => {
+      const cookieJson = {};
+      const items = cookieRaw.split(/[ ,]+/);
+
+      items.forEach((item) => {
+        const parts = item.split('=');
+        cookieJson[parts[0]] = parts[1];
+      });
+
+      return cookieJson;
+    };
+
+    // Iterates over JSON, and adds to browser cookie store
+    const setCookies = (cookieJson) => {
+      Object.keys(cookieJson).forEach((key) => {
+        document.cookie = `''${key}=''${cookieJson [ key ]}`;
+      });
+    };
+
+    alert('The Nixy theme will be applied.');
+
+    // Call set cookies, passing in formated cookie data
+    setCookies(cookieToJSON(cookie));
+
+    // All done, reload page for changes to take effect :)
+    location.reload();
+  '';
+}