Like other members of the Periegops genus, P. keani has six eyes. The carapace is a red-orange colour on the anterior end but is orange on the posterior end. The abdomen is creamybrown and has a faint chevron pattern. The first pair of legs are orange brown with light orange ends, the other pairs of legs are yellow brown and darker at the proximal end. Chelicerae are red brown.
The species is not known to build webs for prey capture, but rather web is used as drag lines and to build silk retreats. The related P. suterii is likely a fast moving nocturnal hunter.