The picture of Reace's truck and trailer on vacation has graphics colored Battleship Gray. We liked it so much when we saw it in person, that's what we ordered.
My preference would be to match or complement the tug, which is problematic if the tug changes. Independent of the tug, my favourite colour is blue and an intense blue would look good with the white (and with alloy wheels).
Ours is the standard red to go with our Tacoma. Having said that, our previous 5.0 was also red that didn't match, but still looked terrific, with our grey Mazda truck! I like strong colours against white, but I haven't seen an Escape yet with graphics I didn't like