Those garish colors probably aren't the real colors either. The researchers found one speck of paint and assumed the whole surface was the same color, when in r

Those garish colors probably aren't the real colors either. The researchers found one speck of paint and assumed the whole surface was the same color, when in reality the paint probably had complex gradations of color, like any normal painting. There is no need to assume the painting was less sophisticated than the sculpture underneath it.