What is Contrast?
Contrast is a relationship between two or more elements with dramatic visible differences. It can be created using colors, shapes, sizes, and other features.
More About Contrast
Color is one of the most common uses of contrast. Light and dark colors are a common contrasting element on a webpage. For example, you can have a dark background with a light text overlay.
Furthermore, the use of foreground and background can create contrast on a webpage. This can be as simple as using a distinct background image behind your text boxes.