Earth tones are a range of colors that are derived from natural elements found in the environment. These colors include siennas, ochres, ochers, TANS, and sepias. Siennas are reddish-brown hues, ochres are yellowish-brown hues, ochers are yellowish-red hues, TANS are light brown hues, and sepias are dark brown hues. All of these colors are considered neutral colors, meaning they are not too bright or too dull. Earth tones are often used in interior design to create a calming atmosphere.