Sandy desert appears light blue in the Snow RGB images, in some areas with greenish shades. More greenish shades appear at lower solar elevations. Rocky desert appears medium blue (see the images below and left).
Explanation of the colours for sandy desert (see also the recipe on the left side):
• The reflectivity of sand is higher in the NIR1.6 channel than in the VIS0.8 channel. After linear stretching, the green signal will be even
higher compared to the red beam (see the ranges in the recipe). For high solar elevation usually both, the green and the blue components saturate,
while the red component is also considerably high. The resulting colour will be light blue. If the solar elevation is lower, then the sandy desert
is shown in greenish tones in some areas.