 Complete the following phrase:  Synthetic pigments imported from Germany began to replace traditional organic ones in the mid-19th century. Many prints from this era made extensive use of a bright red, and were called red pictures. Artists such as Yoshitoshi 18391892 led a trend in the 1860s of gruesome scenes of murders and ghosts, monsters and supernatural beings, and legendary Japanese and Chinese heroes. His One Hundred Aspects of the Moon 18851892 depicts a variety of fantastic and mundane themes with a moon motif. Kiyochika 18471915 is known for his prints documenting the rapid modernization of Tokyo, such as the introduction of railways, and his depictions of Japans wars 