Shadow Evelynn Theory?

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I noticed that Shadow Evelynn has the same blue highlight in her hair like Kayn. Maybe this detail has something to do with using shadow magic? It was stated by one of the rioters that those who practice the shadow arts gain white marks on their body, symbolizing their total control and power over the shadow arts. In Shadow Eve's splash, she has some sort of mark on her stomach area, though it may just be something else. I thought it looked familiar and realized Kayn has the same blue highlight, in both classic form and shadow assassin form (as well as the marks on his body along his right arm, and all over his body while in shadow assassin form). They also share the same blue and black color scheme. Also, I'd assume that the name of the skin is implying her using the shadows, which she basically already does. Any thoughts?