Colour Booth was a breakthrough in Snow’s practice, illustrating the artist’s inventive approach to creating non-representational sculpture, or, in other words, sculpture that does not resemble any aspect of our physical world. The painted sculpture consists of a blue panel perpendicular to a taller green panel with orange and yellow lines. Here Snow blends together three-dimensional sculpture and two-dimensional modernist abstract painting. During this time, renowned American artist Donald Judd was also pondering non-representational sculpture; unlike Snow, he arrived at a Minimalist style characterized by rectilinear forms and commercial materials.