Why did you have to switch to python3?
https://github.com/nojhan/colout/commit/37934e9266d05e1519ac...
https://github.com/nojhan/colout/commit/64454e42f1cf5a4f8cd4...
Update: 37934e9 still works with python 2.6
https://github.com/nojhan/colout/commit/37934e9266d05e1519ac...
https://github.com/nojhan/colout/commit/64454e42f1cf5a4f8cd4...
Update: 37934e9 still works with python 2.6