His work belongs to the Hard-edge abstraction movement. Jackson often used the diamond or lozenge canvas shape to create a sense of movement within a fixed frame. In pieces such as Chord and Parallel Point #1, he used straight lines and flat areas of colour to explore spatial relationships. He avoided painterly brushstrokes in favour of precise, clean edges. This method creates a visual rhythm that relies on the mathematical placement of every element.

Modern collectors find his work appealing because of its architectural quality and structural balance. The Passage Series and Cross Series Green Over Violet use limited colour palettes that suit contemporary living spaces. His prints offer a sense of order and calm. The focus on linear precision makes these works effective for rooms with minimalist decor or sharp angles.