+/**
+ * garglk_set_zcolors_stream:
+ * @str: a stream.
+ * @fg: a 24-bit foreground color.
+ * @bg: a 24-bit background color.
+ *
+ * This function changes the foreground color of @str to @fg and the background
+ * color to @bg. @fg and @bg are encoded the same way as described in
+ * %stylehint_TextColor. See garglk_set_zcolors() for more information.
+ */