Top long-hair radical (Kangxi #190) —
长 (long) over
彡 (streaks), picturing flowing tresses cascading down. It indexes
鬣 in the hair family:
髮 hair,
髯 whiskers,
鬃 horse-mane.
鬣 names the coarse mane along the back of a horse, lion, or wild boar — the radical anchors the meaning as hair.