My 4-year old DS and I dyed bits of roving in rainbow colors. We divided 7.75oz of Merino wool into seven quart-sized Ball jars and poured our food coloring over it. It gave us an ombre effect for most of them, and the violet split into it’s component colors very nicely.
I spun and plied most of it on my Nano, but I did the yellow and orange on my Ashford ES3. The weight varies from fingering to DK. I figure I have about 750 yards total.
In the dye “pot”: