Vim line between code and line number

Question

This may seem like a simple question but I've probably spent hours looking for this to no avail. How do I create a colored line on the right of line numbers in Vim? Like this:

Answer 1

Not sure about the line, but you can change the foreground color to add some contrast.

From http://vim.wikia.com/wiki/Display_line_numbers:

You can change the color used for the line numbers. For example:

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