Jeans, boots and a dull shirt is all I wear hunting. Keep it simple. If I'm hunting with others I'll wear my high vis Browning cap for obvious reasons. I always thought it was kind of silly to wear camo gear and anything high vis at the same time.
don't forget a face mask and gloves - stops shine from cheeks, forehead etc and as said Patience - Heaps of Patience and no movement. I'm not too sure about a Hi-Vis vest/shirt, I'd go for that orange stuff.
Boom, Boom! Tikka, Tikka, Boom! Shoot first, video later.
You must know about certain animals not seeing colour etc.?
They may not see colors like us, but they can still discern different shades, a solid patch of "orange grey" will still stand out against a broken up background of "camo grey". But, visually, movement and unaturally straight lines will give you away more than your colouring. Even the lightweight Chinese gilli suits aren't perfect because the fabric doesn't move in a breeze like natural vegetation.