I've made some updates to Impallari's Font Testing Page.

Mainly changed the header style, labels on/off, color chooser.

I'm not quite done but you can fork my version here: https://github.com/andreaslarsen/Font-Testing-Page (it's the theme-chooser branch) and run it in localhost with "cd" to the folder and then "php -S localhost:8000" in terminal.

I'm afraid I need to rewrite a lot of the styling to make it perfect (currently grey + dark background doesn't look good when saved as pdf) but let me know what you think and it me with other ideas/suggestions.