variable if it exists, or lexicographic order otherwise. See
linkgit:git-config[1].
---color[=<when>]:
+--color[=<when>]::
Respect any colors specified in the `--format` option. The
`<when>` field must be one of `always`, `never`, or `auto` (if
`<when>` is absent, behave as if `always` was given).