The dorsal surface of the oblique-scale snake is reddish-brown, dark-brown, or dark-grey. Brown markings or black-grey markings on the back of the head, prominent arrow-shaped black markings or brown markings on the neck, pale or orange red on the lips and sides, yellowish-white or greyish white on the ventral surface, brown-black markings on the front, and dense black markings on the back .

The oblong-scaled snake's head is long oval, distinct from the neck, the snout is blunt and round; the eyes are large , with round pupils and large nostrils.