We call a color space homogeneous when the distance of a color in space corresponds to the degree of its difference, that is, when there is an equal spacing of the colors in all spatial directions. The only measure for assessing the equal spacing is the perception of the human eye. As a fixed pattern, the window scheme helps us to make clear and repeatable decisions about the spacing of colors, even with the finest nuances.

One dimensional color series

The first step towards a homogeneous color space is a simple series of colors equally spaced along a straight line. We can arrange several such color series until we can no longer find a coherent subsequent color using the window scheme. At this point, we have reached the outer edge of our color space. Click on the following image to create your own color series interactively:
Color series and Window scheme

Two dimesonal color chart (color plate)

Different color series are related to each other. By testing across and diagonally, we can create uniform two-dimensional color charts. Click on the following image to mix your own homogeneous color plate:
Color plate and Window scheme