In William Hayley, George Romney presents a striking portrait of the British poet and biographer. The painting features rich colors, with deep blues and warm browns dominating the palette. Hayley is depicted in a three-quarter pose, wearing a dark coat and a white cravat, which adds to his dignified appearance.

The background is softly blurred, focusing the viewer's attention on Hayley's thoughtful expression. The painting is executed in oil on canvas, a medium that allows for vibrant color and detailed texture. Romney's brushwork is smooth, creating a lifelike representation of Hayley's features. The dimensions of the artwork are approximately 76 x 63 cm, making it a substantial portrait.

The use of light and shadow enhances the depth of the composition, giving it a three-dimensional quality. George Romney was a prominent portrait painter in the 18th century, known for his ability to capture the essence of his subjects. This portrait of William Hayley reflects Romney's skill in portraying not just the physical likeness but also the character of the individual. An interesting fact about this work is that Hayley was a close friend of the artist and a significant figure in the literary world, which adds a layer of personal connection to the portrait.