Seasick fishermen? Ogres?
Getting flesh tone right is an important element to paintings. The Medieval technique was to use egg yolk as a binder and start the coloring with a wash of green.
Layers of browns and pinks can be added on top to give depth to the flesh tones. However, sometimes the layer of pink on top fades and what do you get?
Seasick fishermen. Or actually in this case slightly-green Israelites drawing water.
More color talk in The Brilliant History of Color in Art.
Initial H: Moses Striking Water from the Rock and Israelites Drawing Water, about 1250-1262, Italian. J. Paul Getty Museum.