Yes this is a normal condition for dug clad coins, anything after 1964. Only pre 1965 silver coins will come out shiny. You can wash them and run them in a tumbler with rocks in it for a few hours and they will come out better but still have a dark overtone to them.
See you are relatively new to the forum, also see you're from Mo. I'm from Missouri also. Welcome.
If you think that quarter is shady, wait till you dig up a few of these newer pennies, they look like they survived some kind of nuclear disaster! And yes welcome to the forum. I should post some penny pics.... give me a day or 2.