Process: noun, the series of steps through which one obtains a desired effect or result.
The word process brings to my mind the work of Yves Klein, who emphasized the process of art more than the final result in his live painting performances. In such pieces, Klein used the bodies of female models as paintbrushes. The models rolled around on canvases covered in blue paint, documenting the creative process of the work.
Color Theory: noun, the study of the relationships between variations of light. It describes the formation and resulting hierarchy of light and pigment tonalities when different colors are mixed.
Color theory brings to mind the works of pointillist Georges Seurat. He juxtaposed secondary colors to create an illusion of depth and solidity.