I'm designing a website for the Wind Orchestra I play in, and have had the idea of 4 different colours schemes - corresponding with the four different colours of uniform worn to concerts.

I know that this can be done by using CSS, but was wondering how?

I guess I'd make 4 different CSS Style Sheets, and use a button on a page to change it, right?

If what I say is correct, then how would I go about doing this? If I'm hopelessly wrong, what would I need to do instead?

Thanks.

The four colours, if it helps, are: Yellow, Green, Red and Burgundy.