The background property of CSS allows you to control the background of any element. For instance to change the background of an entire page to a light gray, you could do: html { background: #ccc; } The value “#CCC” is known as a hex code. It represents a color value. There are a number of
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The backface-visibility property relates to 3D transforms. With 3D transforms, you can manage to rotate an element so what we think of as the “front” of an element no longer faces the screen. For instance, this would flip an element away from the screen: .flip { transform: rotateY(180deg); } It will look as if you picked it