Background Color, default background is black on red,

H3 is Inverse red on black with a thick green solid border

You can specify color of any HTML attribute using CSS, for example this is the Span Using white on green black thick solid span is inline; also do not forgot about the psuedo classes and elements :first-child :first-letter :link :active, :visited, :focus
Valid XHTML 1.0 Transitional Valid CSS!