How to draw deserts and improve my map?

[Ravenfield]

I worked on my second map today and came across an issue I couldn't really solve to my satisfaction yet.
How do I draw deserts that look like ... well ... deserts? Both deserts I planned lie right behind mountain ridges in an otherwise humid, tropical to subtropical landscape but I can't get the sand to look like actual sand. It just looks yellow and not integrated at all. Do you have any tips for me (or any advice for improving that particular map for that matter)?

Ravenfield

Edit: Oops, forgot to actually attach an image:

[Azélor]

You should try to lower the saturation. The yellow will look more like sand. And add some red maybe.

[Ravenfield]

Thank you! Turned out quite well.