 
 <prompt> Wetin be di buttons wey no dey purple for di controller? Given di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: ```Standard SNES controller add two extra face buttons (X and Y) to di design of di NES version, arrange di four for diamond shape, and introduce two shoulder buttons. E also get ergonomic design by Lance Barr, wey later use for di NES-102 model controllers, wey Barr also design. Di Japanese and PAL region versions include di colors of di four action buttons for system logo. Di North American version buttons dey colored to match di redesigned console; di X and Y buttons dey lavender with concave faces, and di A and B buttons dey purple with convex faces. Several later consoles borrow elements of their controller design from di SNES, including di PlayStation, Dreamcast, Xbox, and Wii Classic Controller.``` 