Okay, I just found Material Properties > Settings > Viewport Color. The color has to be set there before it shows in the viewport? Seems redundant (as well as confusing and misleading) to have to set the shader color and the object’s viewport color. Isn’t there some way to set the color once for both?
And that makes it easy to go from ‘real’ colors to ‘color-coded’ colors by simply going back and forth from Solid to Material, rather than having to wrestle with changing colors on a whole crap-load of objects.
I knew there was a positive side to this (there usually is) but just hadn’t figured it out yet. Thanks!