Are lilac and blue standard rex rabbits rare?

I'm getting 2 standard rex rabbits this weekend, and I'm going to pick them out soon. According to the breeder, she has lilac, chocolate, blue, black, black otter, and broken standard rex rabbits. So, I thought that I would get a lilac rex rabbit. My brother wants to either get a blue or black otter standard rex rabbit. Are lilac or blue rex rabbits rare? Which variety is the rarest? Do lilac rex rabbits do well on the show table? Thanks! :)