it means that if the candle flame turns blue, a ghost of a family member is present, but if it turns black, u have a black witch on your hands, this is very bad, and another tip, never use a Ouija board, it attracts dark spirits
Answer Scientifically when a flame goes blue it means it is burning properly with alot of oxygen (complete combustion).
Answer It means a spirit is present yes. It isn't always just a family member though blue flames have been noted in a number of haunting cases including violent ones. Also its Ouija not Wuigy