I'd say if you care about consistency across media, try to make your colors have different luminosity, so they can still be distinguished somewhat when someone

I'd say if you care about consistency across media, try to make your colors have different luminosity, so they can still be distinguished somewhat when someone invariably prints them on a monochrome printer. Also, pure yellow (and to some extent pure green) tends to end up nearly invisible on a lot of color inkjet printers, so tweaking the luminosity is also important there. Overall I think most of the tips this article advocates will also help across various mediums.