The color scheme is very easy on the eyes and very pleasant to look at. I tend to do my oceans in blue but for this I think that the parchment alone really conveys something and that a colored ocean would detract from the "feel" of this map. Good decision and I could probably take a clue from you there in that I don't always need to color everything. The only thing that I really see as a bit weird are the tan dots in the forest - whether those are eraser-holes or non-blurred color adjustments I think that a blur there would go a long way. That's a very minor thing and on the whole it's a great looking map base.