Board Thread:Character Discussion/@comment-5817180-20160516043921/@comment-25926288-20160522221229

The chart is for magic users, not users of magical items (except fairies).

Zelena used the slipper way before she leanrned to teleport and the smoke was green. Red used the slippers, it was white, Dorothy used the slippers and it was white.

Henry and Isaac used a quill to perform magic and just because it led to two different smoke colors, means that it's worth mentioning on trivia, but it wouldn't go into that magic chart of colors on the Magic page.

And I'm not wrong, the item produces the magic, not the person. Some depend on the person, some don't.