Default colors are not contrast enough on dark backround
and this functionality, which uses more suitable colors
is hidden in the code.
Signed-off-by: Petr Vorel <pvorel@suse.cz>
+Used color palette can be influenced by
+.BR COLORFGBG
+environment variable
+(see
+.BR ENVIRONMENT ).
+
.TP
.BR "\-t" , " \-timestamp"
display current time when using monitor option.
.TP
.BR "\-t" , " \-timestamp"
display current time when using monitor option.
or, if the objects of this class cannot be listed,
.BR "help" .
or, if the objects of this class cannot be listed,
.BR "help" .
+.SH ENVIRONMENT
+.TP
+.B COLORFGBG
+If set, it's value is used for detection whether background is dark or light and use contrast colors for it.
+
+COLORFGBG environment variable usually contains either two or three
+values separated by semicolons; we want the last value in either case.
+If this value is 0-6 or 8, chose colors suitable for dark background:
+
+COLORFGBG=";0" ip -c a
+
.SH EXIT STATUS
Exit status is 0 if command was successful, and 1 if there is a syntax error.
If an error was reported by the kernel exit status is 2.
.SH EXIT STATUS
Exit status is 0 if command was successful, and 1 if there is a syntax error.
If an error was reported by the kernel exit status is 2.