Highlighting the current line number in vim

Question

Is there a way to highlight only the current line number (in the left hand coloumn) in vim, without highlighting the background of the current line? Ideally, I

Answer 1

The help for highlight-groups does not mention an exclusive "number of current line" syntax group, so the official answer might be no.

You may want to take a look in the cursorline option which highlights the entire line, if it helps.