+1 to being able to pick a couple (or more) thematic colours at startup that would influence detail colours on clothing/armour, as per original games.
And ideally we’ll have a way to change that later, along with hair, makeup, jewellery and maybe even tattoos.
But while I am totally the sort of player who will sport suboptimal armour and weapons because they look cooler, I would prefer Larian spend their time and effort on things other than making the ability to reskin armour or weapons part of the core game and would rather avoid additional complexity to the interface to support it. For me, this seems like something ideally left to modding.