If you ask a classroom of 20 students to name/describe a color, you will get 20 different answers. Each student observes the same color, in the same light, but his or her life experience will dictate how he or she describes and names the color. The color they see is the result of biosensors (eyes and brain) receiving reflected visible electromagnetic energy and creating and image in their brain. While the human experience of color varies with individual biology and life experience, the envelope of electromagnetic energy reflected from a colored object can be measured and quantified. Activities to teach how reflectance spectra are taken, how to read the spectra to interpret the object's color, and how the reflectance spectrum of individual colors can be used to illustrate the rules of color mixing and color theory will be shared.