User blog comment:Silvermilitia26/Hi/@comment-5590986-20140602232604/@comment-5590986-20140602233240

If you have Paint.NET you need to adjust the tolerance of it.

Too little Tolerance = not much colored, Too much means it will fill everything.

Check out this video I made if you want to get specific data:

https://www.youtube.com/watch?v=YyO8F6Euras