2d - Some of my grease pencil strokes are grey while others are

I have a Blender file that is producing some strange Grease Pencil lines. On frame 177 my strokes turn gray, and you can really see it since I have a little color behind the head. The strokes aren't

Creating Roblox Styled 2D Digitally Hand-Drawn Art with Blender - Community Tutorials - Developer Forum

Blender Grease Pencil: Creating 3D Environment Illustrations - gskinner blog

animation - Why is my ONE grease pencil layer transparent against the background? - Blender Stack Exchange

Grease pencil strokes greyed out when object is behind them (Draw mode) - Basics & Interface - Blender Artists Community

How grease pencil brushes work in Blender

Stroke Edit Mode — Blender Manual

Intro to Blender Lecture 05: Grease Pencil for 2d & 3d

animation - Grease Pencil why are black strokes gray, and how to make them black for a rendered image? - Blender Stack Exchange

Create Rigged Grease Pencil Animations in Blender - CG Cookie

How to convert a line drawn with a grease pencil into a 3D model.