In Island Sunset, Gallagher explores the intersection of nature and abstraction through a vibrant palette and clean, graphic lines. The composition centers on a large, glowing orb that anchors the sky, casting a rhythmic glow over the sea and shore through layered shapes. It is a study in how minimal geometry can evoke the heavy, humid air and the slow transition of light at the edge of the world.

The artist prioritizes a sense of harmony, using a balanced arrangement of natural entities to create a tranquil space. By stripping the landscape down to its essential elements—the curve of a hill, the flat expanse of water, and the dominant celestial presence—Gallagher captures the emotional resonance of a summer memory rather than a literal depiction.