Another fab outfit, Suz! I can see why you love those slonchy skinnies! I cannot find a pair with that slounch for the life of me!:-((
I always love a column of color, so I actually very much love navy/ink (and grey) paired with denim. I would just pay attention not to have shade which clashes somehow (as you also said) with the shade of the denim I am wearing. But your navy sweater looks great with these skinnies! AND esp love the grey animal belt! (I have bought one similar for my DD, as it matches somehow the fadings, isn't it?)
Although navy suits me well, unfortunatelly I don't wear lot of jeans nowadays, so have only a few piece of all kinds of clothing item navy or ink and pair them rather with whites in summer (but have more in greys, as they go better with my lighter jeans and blacks, too).