Theoretically speaking, it is possible. As long as a single type of pigment is used in calligraphy and painting works, it can be used for calligraphy creation, but it is limited to practical calligraphy writing in the traditional Chinese painting space, such as inscriptions. For traditional Chinese painting, the appropriate writing color should be selected according to the color used. For example, if the painting is yellow, use purple or green for writing; if the painting is brown or darker, use warm colors for writing.