It will come as a surprise to no one that white, pink, and purple are the most populous ponies in my collection, as these have long been the favourite colours of Hasbro. Blue and yellow are the next most popular colours for ponies. Orange, green, and "other" colours, including peach, grey, and black, are the least popular. The "other" category is well represented here due to the Peachy/Snuzzle army.
And that's the end of my 2017 Pony Census.