This is great; nice work. The only feature I see missing is the ability to edit the resulting JSON file. This would also allow users to base their theme off of existing themes, which would be my primary use case for something like this.
Often I love a theme except for one or two small details, and it'd be nice to edit them in this tool.
Often I love a theme except for one or two small details, and it'd be nice to edit them in this tool.