Adjacent colors 15 two colors

Quick answer：

Adjacent colors in color theory refer to hues that are next to each other on the color wheel. When discussing '15 two colors,' it seems there might be a numerical reference. However, in color theory, adjacent colors are typically pairs of hues that are next to each other without a clear numerical value. If '15' refers to a specific color scheme or a specific set of two colors, more context would be needed for an accurate explanation.