I personally like the juxtaposition between the title and the cover. For me, "Colours" suggests liveliness, fun, even messiness, and then the covers show an image of Ayu that is remote, distant, serious, cold, and polished, reinforced by the blue tint. I would like to read it as emphasizing the tension between the sleek EDM sound she is exploring and the usual emotional rawness/raggedness of her lyrics/music.
But maybe I'm just over analyzing
Also, I think the idiosyncrasies in the font are just a matter of graphic design balance (vowels are in lowercase, left, left, right, increasing number of letters so Colours is in the middle) but they also wanted a smidgen of visual interest.
Makeup and nail polish are great. They match the cleanness of the covers, and the nail tint gives off a cool (cold), stony vibe. Recently, I've been obsessed with geologic colors like slate.