If you are interested in color dithering with different color difference metrics [1], I've implemented just that [2]. You can find an example comparing metrics in my docs [3].

[1]: https://juliagraphics.github.io/Colors.jl/stable/colordiffer...

[2]: https://github.com/JuliaImages/DitherPunk.jl

[3]: https://juliaimages.org/DitherPunk.jl/stable/#Dithering-with...