According to Sylvester's SimDNA in SimPE, his hair was black before it turned grey. According to his age data, he had 14 days left in the elder life stage when he died. Sylvester uses the 3rd Maxis face template in Create a Sim, except for the ears and the nose. If he is resurrected and aged down to an adult, it becomes clear that his ears and nose use the 21st face template, which is one of the two broken face templates. The jaw is also shorter than on the default template. However the jaw is only shorter on teenage, adult, and elder males, which may mean that the jaw was genetically passed down, as this oddity generally only occurs on Sims whose facial features were genetically passed down.