YB will help to a point keeping her brighter but not as much as enchi. I don't have any of that exact combo to show you as most of my YB complex stuff has enchi. It also just really depends on the pastel line. Some stay bright without any other morphs to help, while others brown out really badly. I can snap a recent pic of my enchi pastel asphalt later today if that helps though, this is her at a bit over a year and she basically looks the same but larger: