Plain and minimalist is good. But the ability to add colour to it all, with just one click is even better!
Just added the ability to change the whole colour scheme of my website with just one click. You’ll find a simple dropdown in the footer (at the bottom) of each page. Just choose a style and BAMM, everything changes! Will be adding more styles as I go along.
I used a template style-sheet and then drew up the colour pallets to use. The form sets a session variable that decides which colour pallet to apply. Simple.

Next steps? Change the whole layout, using the same method, instead of just the colours.
