--- a/.bashrc	Thu Dec 22 16:47:44 2022 +0200
+++ b/.bashrc	Sun Dec 25 16:44:57 2022 +0200
@@ -163,7 +163,7 @@
 complete -F _mypath mypath
 
 # LANG=C for speed.
-alias grep='GREP_COLOR="31;47" LANG=C grep --color=auto'
+alias grep='GREP_COLORs="31;47" LANG=C grep --color=auto'
 case $OSTYPE in
   linux*|cygwin) alias ls='ls --color=auto' ;;
 esac