https://textart.io/js/colorscheme.js

1function set_homebrew_scheme(elementid) {
2    var element = document.getElementById(elementid);
3    element.className += " ascii-homebrew";
4    element.className = element.className.replace( /(?:^|\s)ascii-dark(?!\S)/g , '' ); 
5    element.className = element.className.replace( /(?:^|\s)ascii-light(?!\S)/g , '' ); 
6}
7
8function set_dark_scheme(elementid) {
9    var element = document.getElementById(elementid);
10    element.className += " ascii-dark";
11    element.className = element.className.replace( /(?:^|\s)ascii-homebrew(?!\S)/g , '' ); 
12    element.className = element.className.replace( /(?:^|\s)ascii-light(?!\S)/g , '' ); 
13}
14
15function set_light_scheme(elementid) {
16    var element = document.getElementById(elementid);
17    element.className += " ascii-light";
18    element.className = element.className.replace( /(?:^|\s)ascii-dark(?!\S)/g , '' ); 
19    element.className = element.className.replace( /(?:^|\s)ascii-homebrew(?!\S)/g , '' ); 
20}