According to Barbara's SimDNA in SimPE, her hair was black before it turned grey. According to her age data, she had 14 days left in the elder life stage when she died. Barbara uses the 14th Maxis face template in Create a Sim, except the jaw is slightly customized, and the lips are slightly thinner. Strangely, she has memories of her parents getting engaged and married, despite both parents having memories of doing this before Barbara was born. Also Barbara only has the memory of Samantha being born, and she has no memories of Kimberly whatsoever. These were most likely some oversights made by the developers.