Maybe I'm a weirdo but I rather like his first example of "unless you want your site to look like this". The red is a bit much but it is an error message, after all. Overall it looks like the iconic Santa Fe Railroad "bluebonnet" color scheme:

https://www.google.com/search?q=santa+fe+bluebonnet&source=l...

It would certainly stand out on my desktop. Depending on the application, could be a plus. Probably not natural for a mail client or text-centric app, but you never know.