I think there are 5 at least from
my map (there may be 6 as there might be one lighter than Washington as I have 4 waymarks there and might be something darker that I haven't seen yet but Missouri I have almost 2400 so I would doubt it). (could also be another color not showing between my darker two, my 2nd state I still have a little less than 500 so might be a shade there too)