Brown's artistic signature is characterized by his use of rich colors, meticulous attention to detail, and a keen sense of composition. Throughout his career, he created numerous notable works, including 'The Reception of the French Ambassador' (1785) and 'Washington Receiving the Spanish Envoy at Valley Forge' (1786).

These paintings not only showcased Brown's technical skill but also contributed significantly to the development of American art. His artistic style was deeply rooted in realism, which allowed him to capture the essence of his subjects with remarkable accuracy. As an American painter, Brown played a pivotal role in shaping the country's artistic identity and leaving a lasting legacy that continues to inspire artists to this day.