I have to restore a (backupped) version of the Dark colors containing comments to explain each color index where is used in the Terra skin, because this could be very useful to anyone wants to make a similar thing (last year when I've done this I had to check Pivot code many hours to understand this).
So this could become a template for users, but in this case probably should be moved / copied inside the skin packages (for example the TerraTheme_dark.json now is in tutorials) ... we have to see what to do here.
And for new json files, to simplify its usage, probably they should go inside packages of Terra skin, and if possible in a user-friendly package.
To test the new look of any custom colors file, we have to remove some overrides there (if not all, at least some), in Kitchen Sink bxml files, to see "standard colors" of any component.
And verify with the Component Explorer, if I can reload colors without restarting the application, but I think it will not be possible at the moment.