You could try and wrap the container table it with a <div id="differentcolour"> so if for example your Head colour is black with your title in the instance of different colour container is white then you will have #differnetcolour .Head{colour:white;} placed in the container.css.

There area other approach like call your whitecontainer.css and have a css named whitecontainer.css should also work although I have only tried it for different skin type and it works fine. However, for containers it may not work good if on the same page you want to add both type so the page may resolve only the last css it encounters for the .Head.Therefore even you may have choosen white and black in two areas of the page. you will find both turn out one colour.

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