I started with a half yard of fabric that had been previously dyed a mottled blue. I cut it in half and had two fat quarters.
I folded and clamped this and overdyed it with black dye. Some of the blue marks you see come from the clamps resting against the fabric. I have clear moons and “misty” moons!
I overdyed the remaining fat quarter with a mottled black. I have two pieces that coordinate and may or may not be used in the same composition.