1) CSS also allows RGB values to be entered as hexadecimal numbers. 2) Saturation measures the intensity of the chosen color and ranges from 0%(no color) up to 100% (full color). 3) Web pages are unstructured documents in which elements are nested withinother elements, forming a hierarchy of elements. 4) A generic font describes the general appearance of a typeface, but doesnot rely on a specific font definition