I have also had this happen with light purple buttercream. I find that if its left in the light it will loose its color. It happens with fondant as well. If im worried about loosing my color on cakes I try to keep them covered with a towel or away from light best I can manage. It helps.
© 2011-2015 CakesDecor.com. All Rights Reserved.
DISCLAIMER: Any posts on CakesDecor.com (CD) are posted by individuals acting in their own right and do not necessarily reflect the views of CD. CD will not be held liable for the actions of any user.