Donald Judd’s Untitled 10-R (1968) and Untitled 9-L (1978) reflect Judd’s focus on the interaction between color, surface, and space, demonstrating how subtle variations in hue and placement can create perceptual shifts and an experience of depth. The light cadmium red, a color Judd favored from the 1960s onward, articulates form while establishing a dialogue with the surrounding environment, creating visual harmony and balance.

Judd’s smaller, early works like these panels provide insight into his systematic approach to material and color, which informed his larger, monumental sculptures and stack series. They embody his commitment to clarity, repetition, and the idea that artwork should exist as an independent object, fully defined by its material and form.