Lamping about 25+ years ago my dog got a large blue buck, reckon he was a freak,as I hunted the ground for years and never saw any other odd rabbits. However another place had a variety of colours,hunting this place I got a few pure whites over the years ferreting and lamping, saw the odd black, there was a golden coloured one which I saw a few times over a couple of years. I worked nights opposite this place , in the grounds where I worked there were a couple of black and tan rabbits for a few years, they were quite bold as they weren't hunted.
The place I hunt now has dutch coloured rabbits, however the farmer doesnt want them killed so we release any caught when ferreting. One of these rabbits we marked and caught it again the following winter! the farmer told us it was also caught by others ferreting. Obviously a bunny with a death wish.