Blue would be a basic quality of color. Then pale and creamy would be qualities added to the basic quality so as to render it complete. Vivid and deep would be qualities which are mutually exclusive of pale and creamy, but which could also render the quality of blue complete. But not all pale, creamy blues are the same. Therefore the hierarchy of color would have to extend to another level.
Colors come in a continuum.
For this reason, the hierarchy would have to include at least an infinite number of levels. And since qualities are supposed to exist independently of the mind, this hierarchy would not be merely potential, but an existing actuality. And clearly the same problem applies to triangles as well. Triangles may be classified in a rough fashion on the basis of the measurement of their largest angles. This is, in fact, just what Locke did.