This is a pattern that is an offshoot of the recently popularized Purple Haze (a purple Parachute Adams). This fly fishes better because it floats higher and longer, making visibility that much improved.
HOOK: TFS 100, size 14
THREAD: MFC 6/0 Tying Thread, purple
BODY: Tri-Lobal Dubbing, purple - pearl Flash-A-Bou wrapped over
WING: Calf Body Hair, white
HACKLE: Dry Fly Hackle, brown and grizzly mixed
TAIL: Elk Body Hair, natural