Color theory is both the science and art of color. It explains how humans perceive color; how colors mix, match or clash; the subliminal (and often cultural) messages colors communicate; and the methods used to replicate color. Learn more about color theory here.
Composition is the placement or arrangement of visual elements or ingredients in a work of art. Read more about it here.
“Church, Taos Pueblo, New Mexico, 1941” by Ansel Adams in 1941, with a visible grid