Twice Now My Plants Turned Blue

Well, not blue but a faint turquoise color. This is my second harvest of (White Label) white widow. And both times after cutting and drying they turn a strange ugly color. I have also grown sour cream and blue widow alongside, and they both turned out okay. The only difference in the last two grows versus all my previous, is I started using Fox Farm’s trio of dry fertilizers.

Anyone have an idea, or seen this before?