"Color Value" by C. R. Clifford is a practical guide on color theory and its application in interior design, likely written in the early 20th century. The book covers fundamental principles of light, color, form, and proportion, providing insights on how these elements interact to enhance interior decoration. It aims to equip readers with a comprehensive understanding of how to create aesthetically pleasing environments through color choices and their relationships. The opening portion of "Color Value" introduces the foundational aspects of color theory, emphasizing the importance of understanding light in relation to color selection. It discusses how color is perceived as a sensation influenced by light and enumerates various types of colors, including primary, secondary, and tertiary hues, as well as their contrasts and analogies. Clifford also illustrates technical concepts by referencing diagrams and demonstrates how proportions of color can be used effectively in room design, laying the groundwork for practical applications in interior decoration that follow throughout the work. (This is an automatically generated summary.)