A comprehensive illustrated exploration of the fascinating science of color. Arielle and Joann Eckstut, authors of The Secret Language of Color, offer a thorough, readable, and highly visual exploration of the science of color. Organized by 50 of the most essential questions about color across a variety of fields—physics, chemistry, biology, technology, and psychology—this book examines how and why we see color; how color relates to light; what the real primary colors are; how biology, language, and culture affect the colors that we see; and much more. Full of clear and elegant infographics, What Is Color? is a must-have for artists and designers, scientists, students, and decorators, and anyone else whose work or play involves color.