You will find more natural colors are used in flies, not saying no one ever does any bright colors because they do for some things, but Olive, Dun, Brown, Black, Cree, Ginger, Furnace, Cream or White and the like are the most used colors. Lots of natural hair and feather colors. I feel sure I left some out, but this should give you the idea. If your lake is clear I would look at Olive as a good color to try.

As for Scuds specifically here are the most common colors...grays, browns and cream to the most common olive and greens.

Here is a link to a simple tied Scud and from a state close to you called Fox's Arkansas Scud.
"Fox's Arkansas Scud" - FAOL