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.
DIY Naturally Dyed Eggs with Color Dye Chart. Using things like grape juice, tea, beets, carrots and many more, you can dye eggs (and other things?) in beautiful hues. Tutorial and chart from Two Men and a Little Farm here.