The document discusses the three dimensions of color: hue, value, and intensity. It defines hue as the name of the color, value as the lightness or darkness, and intensity as the brightness or dullness. The color wheel is presented as a guide for choosing and combining colors, with primary, secondary, and intermediate hues. Warm colors like red and yellow are described as appearing hot, while cool colors like blue appear calming. Different color schemes are outlined including monochromatic, analogous, complementary, split-complementary, triad, and accented neutral.