Modelers I know add white to it, to lighten it up some. I myself like the color but through weathering applications I think it will lighten up naturally.
So you either add white and repaint all that good hard work or try weathering it. I painted my Sturmtiger this base color but the dullcote really knocks the color down some and then using Airbrushlers advice on window frosting (from Valspar at Lowes) really works, but be careful on too much application.
~ Jeff