Yeah I tend to keep the Silicon the same throughout, the only possible exception to this would be if the Silicon was a dark grey or charcoal, I'd use white around the sanitary ware in this instance. The most frequent colours I tend to use are , light grey, jasmine, limestone and sandstone, so being quite light colours, the Silicon doesn't look out of place against white sanitary ware.
I'm exactly the same.
I also grout up to the ceiling.