Hi, this is working great so far, and the tool and its internal tutorial were very helpful. Thanks for making it! A few things initially confused me, which I am passing on since you might find them useful to know:
I initially misunderstood this as a tool to download in addition to Better Colorize for Ren'Py, but afaict it's an alternative, containing the same shading code, but with a code creation tool instead of code examples. I think both pages could be clearer about this.
The internal documentation assumes the user has better_colorize_examples.rpy and points the user to read that instead of your online tutorials etc, which confused me for a bit until I realised what was going on.