Unclear instruction to the not be able to calculate the color issue

"For some color schemes, Limelight may not be able to calculate the color for dimming down the surrounding paragraphs. In that case, you need to define g:limelight_conceal_ctermfg or g:limelight_conceal_guifg"

It wasn't clear to me how i was suppose to define those.
Me and other user made the mistake of copying the entire example bellow to our vimrc file.
You might want to clarify that each of those line represent individual examples,
in my case only adding "let g:limelight_conceal_ctermfg = 'Gray'" to my vimrc solved the issue.
but i still feel like, it was not really clear, that this was what i was suppose to do.