One of the defining aspects of David Aspden's work was his deep exploration of colour. He believed that hues in painting could either complement or contrast with one another, and he often incorporated both harmonious and opposing palettes into his compositions. Aspden saw ... these visual choices as a powerful means to express a wide spectrum of emotions—ranging from exhilaration to despair, well-being to calm. His commitment to this exploration made him a pivotal figure in Australia’s non-figurative art movement, leaving an enduring legacy on the country’s artistic landscape.

“Lady Macbeth” showcases Aspden’s skilful manipulation of these elements to create the emotional and visual impact he sought. Much like Lady Macbeth’s complex influence over her husband in Shakespeare's Macbeth, Aspden’s control over his medium is both commanding and subtle, though without the tragic ending that befalls the characters in the play.