Please help.......I made a dozen beautiful pale pink wilton icing buttercream roses on Saturday. I put them in an airtight container for use on Thurs. Today I looked at them and they are almost white. A ivory color. 
Does anyone know what might have gone wrong with the color. I used Wilton paste color.
Thanks in advance!
As it was explained to me over 20 years ago.....
Purple, lavender, reds and pinks will fade because of the removal of the #2 Red Dye from the market over 20 years ago. Since then, the reds are not very stable. Don't expose them to sunlight as that will cause the red to fade out (and turn your purples into blues).
I read somewhere that if you do not put milk in your icing, the purple will fade. I made a backyardigans cake recently and after the icing dried, some of the characters turned a blue/grey color instead of burgandy. I hope this helps.
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