Interesting effect, huh? I chose black so that the silver might appear like a side rail more than a skirt. But that was at the risk of making the van appear higher not lower. It is lower by 40mm on the suspension and these skirts are another 65mm (not sure if that's total depth or additional depth below the sill). I'd be interested how that compares to the OEM side rails for real-life ground clearance.
I've got the Vanstyle skid plates to fit which will add more black to the front and back, I'm hoping they will make the front and back appear higher too, to match.
You can paint / wrap these skirts by popping out the silver trim, so I've the option to go body colour later. See this thread for details: