Photoshop. One color, a warm orange-brown (226 - 199 - 115). Layers: 40% transparent line sketch above a couple of layers for lighter and darker 'washes' and above a mid-tone fill layer. The 'washes' were about 15% to 30% transparent blurry edge brushes. It is fast to do. Daumier liked combining ink, charcoal and transparent watercolor for a fresh 'sketch' look.