Color is everywhere, and when it's everywhere at once, it can be as ephemeral as a rainbow, as sudden as colored powder raining down at a festival, or as necessary as a natural defense. No matter where you look, life is in color.
Here, a woman prays at the 18th-century Vakil Mosque in Shiraz, Iran. Islam is the official religion of Iran, practiced by about 98 percent of the population.
(For more pictures of the amazing colors of our world, buy the National Geographic book Life in Color.)