Fundamentals of painting encompass the essential principles and techniques that form the foundation of creating visual art. This includes understanding Color Theory, such as Hue, Saturation, and Value, as well as mastering Color Harmonies like Complementary, Analogous, Triadic, and Split-Complementary schemes. Additionally, knowledge of Composition, Light and Shadow, Perspective and Proportion, and proper use of Mediums and Materials are crucial for artists to effectively convey their artistic vision on canvas or paper.