This document discusses different color combinations that can be used in presentations. It explains that there are 12 colors in the color wheel that can be combined in various ways. Some combinations include complementary colors that are across from each other, analogous colors that are next to each other, split complementary that combine two adjacent colors with a complementary one, triadic that use three colors forming a triangle, and monochromatic that use tints and shades of a single hue. Understanding these color combinations from the color wheel can help designers create effective color schemes for presentations.