Hosts may define their own color scheme and store colors in shape properties that are an index to that scheme plus an indicating flag (see Appendix B). Since hosts' color schemes are independent of each other, the color scheme is saved when rendering to the clipboard. If the clipboard data is pasted back into the same application, the color scheme block is ignored; otherwise, it is used to translate scheme colors in properties into RGB values.
The data in the block is an array of RGB values, saved as LONGs in order of color scheme index.