Where does “сливовый” come from?

сливовый (Russian) comes from Russian сли́ва, from Old East Slavic слива, from Proto-Slavic sliva, from Proto-Balto-Slavic *slīˀwā́ˀ, from Proto-Indo-European (s)leh₃y- — blueish.

сливовый (Russian): plum