From 74445674f2653a88aef4c7c9f8ad90784823a763 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 28 Jan 2019 08:41:02 +0530
Subject: [PATCH] Specify the behavior of underline color w.r.t. reverse video

---
 docs/protocol-extensions.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/protocol-extensions.rst b/docs/protocol-extensions.rst
index a4c34f407..0039b42f5 100644
--- a/docs/protocol-extensions.rst
+++ b/docs/protocol-extensions.rst
@@ -51,6 +51,9 @@ To reset the underline color (also previously reserved and unused)::
 
     <ESC>[59m
 
+The underline color must remain the same under reverse video, if it has a
+color, if not, it should follow the foreground color.
+
 To detect support for this feature in a terminal emulator, query the terminfo database
 for the ``Su`` boolean capability.