I haven't yet seen any charging for figures, only charging for colour figures (which probably really significantly increase cost). But since I don't know anybod

I haven't yet seen any charging for figures, only charging for colour figures (which probably really significantly increase cost). But since I don't know anybody who reads papers on paper it doesn't really mater anymore. And you might make the point that making sure that your figures loose as little information as possible when viewed on greyscale also improves accessibility.