diff --git a/cmd/circolog-tail/main.go b/cmd/circolog-tail/main.go
index 1ca05af..e0ecfd2 100644
--- a/cmd/circolog-tail/main.go
+++ b/cmd/circolog-tail/main.go
@@ -64,7 +64,7 @@ func main() {
 	flag.Var(&filter, "where", "sql-like query to filter logs")
 	// TODO: change to color-mode=auto/no/always
 	hasColor := BoolAuto_AUTO
-	flag.Var(&hasColor, "color", "dis/enable colors")
+	flag.Var(&hasColor, "color", "dis/enable colors; yes/no/auto")
 	flag.Parse()
 
 	if hasColor == BoolAuto_NO || (!isatty.IsTerminal(os.Stdout.Fd()) && hasColor != BoolAuto_YES) {