I create a desert world, but I would like to give it slightly different properties, above all, to turn it from a dry environment into a humid one.
Unfortunately, for some time I have been looking for information that could lead me somewhere, but I find nothing scientifically useful.
What would have to change in the sand itself to be blue and moist, preferably excluding the presence of water and vaporing? Is it possible to create humidity sensu stricto without water? Or anything similar to this gaseous state of water?
I'm aware of Atacama Desert, where fog rolls in from the ocean, preserving high humidity in the air, but that doesn't teach us anything about my idea.