Still not a one step solution and its a bit different cross browser. Its not a one step solution because you have to either modify an identifier in the page to support another additional template or completely throw the default colors away so that the new colors replace the default colors.
The little one line JavaScript code is literally copy/paste which allows for moving between pages and page refreshes and pressing up arrow then enter on the keyboard to reapply the theme change without manually reapplying a new stylesheet and/or modifying the DOM each time.
Still not a one step solution and its a bit different cross browser. Its not a one step solution because you have to either modify an identifier in the page to support another additional template or completely throw the default colors away so that the new colors replace the default colors.
The little one line JavaScript code is literally copy/paste which allows for moving between pages and page refreshes and pressing up arrow then enter on the keyboard to reapply the theme change without manually reapplying a new stylesheet and/or modifying the DOM each time.