Armor dyes can change your armor color but you cant get the formula from merchants to craft it so you have find it in toussaint at different locations ,i am gonna show you how to get it and where on the map ,note: the locations are marked by small custom green marker.
1 – Black armor dye

You can find it on a skeleton next to a chest
2 – Gray armor dye

You can find it inside the witch’s house
3 – Green armor dye

You can find it in the builders camp next to the tent
4 – Purple armor dye

You can find it on the cart next to the shack
5 – Blue armor dye

You can find it on a skeleton in the cave
6 – Orange armor dye

You can find it on the broken wagon
7 – Brown armor dye

You can find it in the chest
8 – White armor dye
You can find it at the hanse base in a small chest on the roof but first you have to take over the base
9 – Yellow armor dye

You can find it at the hanse base in the tunnels on the alchemy table but first you have to take over the base
10 – Turquoise armor dye

you can find it inside the cave close to entrance
11 – Red armor dye

you can find it inside the cave at the end
12 – Pink armor dye

You can find it inside the cemetery on a skeleton but this one harder to find