Hairs of new infants (neonates) are dark grey to black and are quite sparse. Infant faces are pink and become darker over time. The hair gets more plentiful and changes colour and the face changes from pink to a dirty brown and finally to black. Adult colourations is reached by 6 months of age.
Note: It can be difficult to tell the sex of a young infant vervet as both have relatively large external genitalia and both the scrotum of males and the labia of infant females are a pale blue. It is best to focus on the location of the genitalia to identify the sex of an infant. The male genitalia are more ventrally located.