http://www.canelasoftware.com/metacard.html
- -
Oh, Look; there's a Paint Tools palette . . .

Oooh: that explains quite a lot as there is the 'revcolorchooser' stack in MetaCard:
- -
And, Wow, that's fairly ugly:
- -
But the MetaCard GUI/IDE/WTF has a certain charm by modularising everything.
I know that 'way back when' KM's new GUI for MetaCard (Runtime Revolution) did bring a ton of capabilities of the MetaCard 'thing' to the surface, and in that respect it was a very good thing: but, like many, many things throughout history, by improving one aspect of something some other aspects got lost.
We are not obliged to keep to the inherited front-end (although I would tend to keep fairly close to it), so we need to consider if it might be a good thing to bring back some features of the MetaCard 'thing' that have not been seen for about 24 years.