Guild Wars 2

I have tested a few like midnight ice, but they all look more grey than black. What do I need to make them really black?

Shadow Abyss is the darkest you can really get. And even with Shadow Abyss it results in just a slightly darker grey than the ones you have already tested. It’s how they made the legs themselves that prevent colors from being as dark or rich as they should be. It has been like that for over 3 years, so I do not expect it will ever be changed to dye properly, sadly.