Beige colour (5)
(Other definitions for buff that I've seen before include "Polish; yellowish-beige" , "Polish - light colour - expert" , "light shade" , "Yellowish brown" , "An informal enthusiast as for rugby" .)
(Other definitions for taupe that I've seen before include "colour of moleskin" , "Grey-brown colour" , "Greyish brown" , "shade" , "Brownish-grey colour" .)