His work focuses on the human form through a lens of tenderness. In "Charity" and "Angelica and Medoro", he uses a palette of golden ochre and soft reds. He often painted secular and religious subjects with the same gentle touch. His figures possess a sculptural quality but remain fluid. This balance between structure and soft edges became his signature style. He avoided the harsh shadows common in Baroque art at the time.

Modern collectors value Blanchard for the calm atmosphere his paintings create. His compositions do not overwhelm a room. The muted tones and classical themes provide a sense of historical weight without feeling dated. Works like "Saint Sebastian Tended by Irene" offer a quiet narrative that fits well in contemporary interiors. His art provides a window into the transition of French painting toward a more lyrical aesthetic.