Red, the heartbeat of passion, the only color that can compete with the intensity of black and white. Red is the blood that runs through our veins. It is the emblem of life. Red it is not just a color, it's an emotion.
Hand-coloring black and white photos, is an ancient art in photography's history. In an era when color photography did not exist yet, photographers and artists relied on manual methods to add color to monochrome images. Very popular was to use blood to create sunset-like hues.