For example, if a building has three colors that correspond to blocks, then you could slot a pinewood for the primary color, spruce for secondary, and larch for tertiary. Then when looking at the building in design view, it would show the color scheme saved.
This is purely a quality of life addition, but I think many people would find it helpful in designing aesthetically pleasing buildings. Sometimes it can be hard to picture how colors would go together when just seeing one at a time.
A rough draft of what this could look like (I made this in two minutes, forgive me.)

Thanks.