bug#36472: 27.0.50; Convey information by showing line numbers using different colors?

[Dmitry Gutov]

There is a feature request for diff-hl: to indicate the VCS status of
different lines by using the colors of the line numbers, instead of
fringe or margin indicators.

(https://github.com/dgutov/diff-hl/issues/124)

I think this is not possible yet, but if there was a hook to choose how
a number is displayed, I'd be able to use it.

In GNU Emacs 27.0.50 (build 70, x86_64-pc-linux-gnu, GTK+ Version 
3.22.30, cairo version 1.15.10)
 of 2019-06-19 built on zappa
Repository revision: 922121e7ddbc107da14ea9c1280d15c828e85063
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12001000
System Description: Ubuntu 18.04.2 L