šärä - black horse with white spots; blackish; light-dark
(EDG 584)
PWS
*šḥr - to be white on black or black on white
(Kogan 2005c:191)
May be tentatively compared to Akk. šūru, šuḫru if the latter indeed denotes dark color as suggested in AHw. 1287 (Bulakh 2003: 13–15; Bulakh 2006: 195–196).