An alternative way of displaying single-band data is to use a colour scale to obtain a pseudo-colour image. We can assign colours (ranging from blue via cyan, green and yellow to red) to different portions of the DN range 0–255. The use of pseudo-colour is especially useful for displaying data that are not reflection measurements. With thermal infrared data, for example, the association of cold versus warm with blue versus red is more intuitive than with dark versus bright.