Hi kass
A warm welcome to the Community from me too. I hope you enjoy our forum. :-)
My Collins complete guide book suggests that 'in recent years, captive-bred forms with essentially violet-blue plumage have been released.'
Might this be like the pheasant that you saw?
i never knew the came in different colours until they started appearing in the garden. turns out they are pretty common
I think they're quite common too, my mum-in-law has a family of three black pheasants in her garden! One of them is particularly dark, the other two are slightly browner but still very dark.
We get quite a few of these around our area mostly on the local shoots.According to local game keepers they call them Blue Pheasants and are a throw back to some oriental birds imported in the late 19th century.