Vim Configure Line Number Coloring

Try:

help hl-LineNr

I found this through:

help 'number'

which is the way to get help on the 'number' option, instead of the :number command.

To actually change the displayed colour:

:highlight LineNr ctermfg=grey

This would change the foreground colour for LineNr on a character terminal to grey. If you are using gVim, you can:

:highlight LineNr guifg=#050505

To change the line numbers permanently add the below to your .vimrc

highlight LineNr term=bold cterm=NONE ctermfg=DarkGrey ctermbg=NONE gui=NONE guifg=DarkGrey guibg=NONE

Of course you change the ctermfg and guifg to whatever color you want.