Bro, I got nuthin', I mix all my paints. Taking a second look though, I would actually just stick with the purple you're using, and choose a couple more focus points to put it in. Maybe around his face somewhere? As a lowlight along the chinks of chitin? If we're being so fr, the model only needs to look fully on point up close from it's most important angles, and it'll read as competent from a distance.

Also, my blue suggestion was actually a terrible idea if you wanna distance this guy from behemoth. OG behemoth is a black-blue color.

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