Hi spartan71.....every time i am in normandy i bring home a couple of sacks of omaha beach for my dioramas!! Its quite dark sand, a bit yellow/grey?? A colour is of course impossible to describe.. I made a couple of years ago a dio of omaha beach (dog green) which i will try to post over the weekend, it might be of help cause the sand is the real stuff!!!. Just dont forget to use plenty of shingle at high water mark.
If you"re doing sword beach there was only a thin layer of sand over grey/black clay, so it all got churned up pretty quick!! But also with shingle!.......hope this is of help.
Steve