Made my batman cake yesterday with buttercream dream recipe from here. I used Wal-brand shortning with trans fat. Colored blue, but it seemed to dry lighter and darker shades. Is this normal to dry this way, so disappionted if this is how it is going to look. I used Wilton coloring, it seems I need to try a different brand? Thanks Marisa
Hmmm. I use Wal-Mart brand shortening and Wilton color and I've never had this happen. 
I don't use butter in my bc. I use Indydebi's receipe.
Is your color expired? Did you use milk or water when making your bc?
I know if you use water in your buttercream and then try to dye it violet or purple, it turns blue-ish instead. If you use milk, it turns violet/purple. Maybe the same is true for dark blue??
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