A classic example of the Washington Color School, this 1960 work by Morris Louis features cascading bands of saturated colour on an unprimed canvas.

Beta Lambda belongs to the series of works Morris Louis produced between 1960 and 1961, known as the Beta paintings. These compositions are defined by their use of Magna, an acrylic resin paint that allowed for rapid drying and high pigment saturation. Louis applied the paint to unprimed canvas, allowing the medium to soak directly into the fibres. This technique removed the physical texture of brushstrokes, creating a surface where the colour appears as an inherent property of the fabric rather than a layer applied upon it. The visual structure of Beta Lambda relies on the arrangement of parallel, vertical bands of colour. These bands originate from the upper corners of the canvas and flow downwards, converging towards the lower centre. The central portion of the canvas remains largely empty, creating a void that balances the density of the chromatic streams. The interaction between the negative space and the coloured lines creates a sense of movement, as the eye is drawn along the paths of the pigment. Louis was a central figure in the Washington Color School. His approach to painting moved away from the gestural marks of earlier abstract movements, favouring instead the exploration of pure colour and its relationship to the flat surface of the canvas. By allowing the paint to flow, he relinquished a degree of control, letting gravity and the absorbency of the canvas dictate the final form of the lines. This method resulted in works that possess a clarity of form and a directness of expression. The palette in this piece includes a range of hues, from deep blues and greens to warmer oranges and yellows, which maintain their intensity against the neutral ground. The work remains an example of the formal rigour that defined the later period of Louis's career, focusing on the optical effects of colour and the physical properties of the materials.