We can set the size of our text in relation to the current size of the text. You can tell the browser to set the type larger or smaller than the currently displayed size.
We can change the color of the text with the font tag!
Think about readability. Text color and background have a strong effect on readability.
Pick text and background colors that aren't jarring. Blood red on garish green might look dramatic, but how long will you really want to look at it?
Not everyone has the same monitor that you do. Colors look slightly different from computer to computer.