Running counter to the 32,000,000 (thirty-two million) colors of the digital photography
technology, as in “I love only one girl,” performed by Elvis Presley, here we say “I love a photo of only one color.”
It could be blue, yellow, or fuchsia, because our appeal here is monochrome. But our option was red. The color that makes us stop in traffic, suggesting that we must stop to look.