The traditional use of font sizes was to create headings and sub headings. That was back in the days when most web pages were text based. They used the headings tags. Let's explore it a little further. This is useful for Text Effects .
Color determines the colour of the enclosed text.
It's represented in a hexadecimal value, two letters for Red, two for Green and two for Blue. See Colours for more information. Face is the actual font you want the browser to se. For example you might want it to use Black Chancery, Technical or Times New Roman. All of the Guide series pages use special fonts.