Gray Pigment in every sketch

[Dubdoll]

Hi,

No matter how many times I edit a pic to be a either a single color or in black and white - I get a single drop of gray pigment in my sketch.

My uploads say 0% gray pigment but when I log ingame, 1 is in every sketch I try! How do I remove gray from my sketch? I have followed all the color codes, stuck to the sizes. If dither is causing this how can I avoid?