Rothko eggs I'm going to do these year 'round Gradient Easter eggs. Put dye in cup so bottom third of egg is covered. After a few minutes add water until half the egg is covered. Repeat until whole egg is covered.
Worked great, tried what the article suggests for the purple, still got gray --> Kool-Eggs dyed with Kool-Aid. No vinegar needed, just mix a packet of Kool-Aid with C Water & dunk the eggs until they are the right color.