You should be fine with the color. Unless you are specifically brewing to enter a competition, it really will not make much of a difference. I will sometimes slip a little Carafa special I (like 10 or 20 grams) just to tweak the color up a bit without much impact on flavor. I do like your choice of Munich and Vienna to add a little more complexity to the malty flavors.
On the hops, Warrior is a pretty neutral bittering hop and works fine with a wide variety of flavor/aroma hops. Mosaic is a daughter of Simcoe, so they will play nicely together. In my experience, Mosaic will add a bit more tropical fruitiness that the Simcoe lacks.