The coloring technique in this painting is very delicate.
Tips
usage
着色 (zhuósè) refers to the act of applying color — used in art, design, and printing. The related noun 着色书 (zhuósèshū) means 'coloring book'. Note: 着 here is read zhuó (to apply/touch), not zhe (aspect marker) or zháo (to catch).
