I think the blue mutation is kind of cool looking. Morgan's tail is dark grey with a bit of maroon popping up along the top of it. You can't see his maroon when his feathers are laying normally (not stretching, flying, ruffled, ect). The pics you posted sort of remind me of him... in a weird kind of "vague resemblence, but not really" sort of way... if that makes sense heh
Thanks for posting those. Like others, I had no idea this mutation existed B)