A 1966 gouache study by Alexander Calder, featuring his signature use of primary colours, geometric shapes, and a bold black spiral.

Alexander Calder is widely recognised for his kinetic sculptures and mobiles, yet his two-dimensional works on paper reveal a consistent engagement with the same geometric vocabulary. This piece, dated 1966, displays the primary colours and fundamental shapes that define his visual language. The composition is balanced by a large red triangle, a yellow circle, and a blue sphere, which are anchored by a bold, black spiral and a series of smaller circular forms. Calder often utilised gouache for these works, a medium that allows for flat, opaque application of colour. The lack of shading or perspective creates a sense of immediacy. The black spiral, a recurring motif in his oeuvre, provides a sense of movement that contrasts with the static nature of the geometric shapes. The arrangement across the white background suggests a playful, almost musical rhythm, reflecting the artist's interest in the relationship between space and form. By the mid-1960s, Calder had refined his approach to abstraction. He moved away from the more complex, surrealist-influenced compositions of his earlier career toward a clearer, more direct mode of expression. This work demonstrates his ability to create visual tension through simple means. The placement of the elements, while appearing spontaneous, is carefully considered to maintain equilibrium across the horizontal plane. The work remains a clear example of his late-career focus on the purity of line and the impact of primary colour, stripped of unnecessary detail or narrative content.