diff --git a/shell/shell.sh b/shell/shell.sh
index 82a1ed2..e164562 100644
--- a/shell/shell.sh
+++ b/shell/shell.sh
@@ -1,5 +1,16 @@
 SH="$(cat /proc/$$/comm)"
 
+shell_color() {
+	local code="${1}"
+	if [ -n "${code}" ]; then
+		case "${SH}" in
+		"bash") printf "\e[0;" ;;
+		*) printf "\033[" ;;
+		esac
+		printf "%s" "${code}m"
+	fi
+}
+
 case "${SH}" in
 "bash")
 	# completion