I debated about hijacking this thread any further, but with the thought that we are exploring color shades on these I will put up a scan of that array of stamp shades I spoke about. My apologies to the originator of the thread, and if this is judged inappropriate, I will pull it and start another thread.

It is necessarily a bit small, even when you click on it, but at least you can get the idea. In the vertical plane the hue ranges between lake at top and carmine below, but two grades of chroma for each give a rough continuum. Unfortunately the terms shifted from dark/light to dull/bright, so it isn't entirely consistent. But the gradation should be evident as your eye traces down the "columns." In the horizontal plane we arrange the stamps in each hue by color value, ranging from deep to pale. That, of course, is just the flip-flop of dark/light which is the more conventional way of discriminating value. But that was the label I used for the chroma, which really should have been deep/pale. So my scales suck, but the depiction of the variations is clear, I think.
Note that I left a gap with but a single entry for the transition from lake to carmine. That stamp really is between everything.