Black and white go with any colour, so have your pick apart from brown or hunter green, I wouldn't choose those on black and white.
Skewbald is just white on a non black base, without dna testing you're probably unlikely to know if the lighter area on the muzzle is from non black or is actually a diluted black, you'd need someone like @chev to help unravel that from parentage if you know it.
Well for first time, got saddle on, and still have to go with purple, but you are lucky, she's going to suit a lot. With Hogan I'd have to steer clear of brown, green,dark blue and stick with vibrant. The above would look flat on him being so dark himself.