They are overblackened. Yes, they also moody and athmospheric, but messy as well. Try to step wider with colors- they are... i dont know what to say, im bad with coloristics too, working with rainbow is really entertaining and exciting... wtf, Ok, im pointless, cant even put toghether my advice.
Wtf, I can't tell if you're serious, but I can't see any thing like that in his drawings. I really like the colouring, and I really think the dark atmosphere of the pictures is a stylistic choice rather than a lack of skill.
meh, where d i say abot lack of skill? shading, texturing, composition, everything ok- im talking about color palette. Yeah, stylistic choice, but this choice outcome may look better, dont you think? (ofc, you probably don't)