While Adams initially was far from thrilled with color, he did experiment with it, unknown to many. A few examples of his color work are available in the online archive of the Center for Creative Photography at the University of Arizona. The subjects which he shot in color ranged from portraits, to landscape, to architecture; a similar scope to that of his black and white work. In fact, toward the end of his life, Adams admitted his regret of not being able to master the technique of color, according to an expert source.