diff --git a/src/libtmux/server.py b/src/libtmux/server.py
index af4c6bd85..929645fd8 100644
--- a/src/libtmux/server.py
+++ b/src/libtmux/server.py
@@ -98,7 +98,7 @@ class Server(EnvironmentMixin):
     config_file = None
     """Passthrough to ``[-f file]``"""
     colors = None
-    """``-2`` or ``-8``"""
+    """``256`` or ``88``"""
     child_id_attribute = "session_id"
     """Unique child ID used by :class:`~libtmux.common.TmuxRelationalObject`"""
     formatter_prefix = "server_"