Simon Pfahler

Defining "convenient" colors is not the job of `xcolor`, but there are packages that do that. I have written the package `colorblind`, which does what you want (and more): [https://github.com/simon-pfahler/colorblind](https://github.com/simon-pfahler/colorblind)...

`infinitessimal_to_cartesian` is also missing for `ot_matrix_complex_additive_group`, fix is identical to the one for `ot_vector_complex_additive_group`.