TYY!! I'm so sick of that color palette, it's Very limited, I'm sure you've seen x) I compiled it all before the comic, and I do like the vibe it gives off, I think it fits. I tried to go for the unconventional, burnt out dystopia, but subtly, and still with a vibrant and lively kinda feeling. I also have a personal rule to never use black or white.
And your cover palettes are AMAZING!! I love the blue and pink hues you found for them, and it would be SO COOL if you decide to do that for the rest (although it does take a long time.... ;-; )
Your backgrounds you make are really Really nice to look at. Very good perspective (makes me jealous XD), really immersive settings. And I think they look really good in black and white, too. Also I like the protagonist a lot x)