Chroma resolution is improved by using 4&colon;2&colon;2 chroma subsampling. Note that the scaling of the luma and chroma channels is "not" identical. The resulting subcarrier sidebands is also known as "chroma" or "chrominance". Descriptions in terms of hue/lightness/chroma or hue/lightness/saturation are often more relevant. Saturation is therefore defined in line with the psychometric definition&colon; chroma relative to lightness (). Soils are characterized by hue, chroma and value. A high chroma color is more pure and less greyed than a low chroma color. The High profile further adds support for 4&colon;4&colon;4 chroma sampling. Hydrogen peroxide has shown positive results involving teeth lightness and chroma shade parameters. Analog formats usually had less chroma resolution. They made use of techniques such as chroma, rotoscoping and wire-rigs for levitation. Examples include the Oberheim Matrix and Rhodes Chroma, and Moog Voyager. Any spill of the chroma key colour will make the result look unnatural. It is commonly used as a background for the chroma key technique. Chroma resolution for both remain unchanged.