asan varnas trayo hy asya
asan-were assumed; varnah trayah-three colors; hi-indeed; asya-of your son Krsna; grhnatah-accepting; anuyugam tanuh-transcendental bodies according to the different yugas; suklah-sometimes white; raktah-sometimes red; tatha-as well as; pitah-sometimes yellow; idanim krsnatam gatah-at the present moment He has assumed a blackish color.