This is the combination i currently use, and like how it looks like: simple, not too fancy, yet accurate.
First off, i use full Grasping Dead armor: unlocked using Shards of Zhaitan, found in Ruins of Arah.
Ancient Silver is the master colour on that combination. Makes a great metal highlight, looking a bit battle worn, rather than having an armor fresh from the armorsmith.
Taupe is used on the leathery parts of the armor.
Last but not least, i use Steel to highlight the skull mark on the right shoulderpad.
Preferred weapons would be those of the Molten series (purchased using Flame Legion Charr Carvings). As for the backpack, i personally use Ambrosial Chef’s backpack.