This is false. Value is one of the seven elements of art and is the range of light to dark in a color. It is used to give depth to an object or show it as flat through the use of color. It is a very important element in art.
The main difference between Greek and Roman art was the purpose the art was meant to serve; the Greeks had a great appreciation for aesthetic beauty and the philosophical theory behind it. Whereas Roman art was used to illustrate wealth and were more so decorative.
