diff --git a/conf/tmux.conf b/conf/tmux.conf
index 0e6c78d6..0d6837dc 100644
--- a/conf/tmux.conf
+++ b/conf/tmux.conf
@@ -44,5 +44,5 @@ set -g escape-time 300
 # Or for tmux >= 2.6
 set -sg escape-time 300
 
-# turn clock green
-setw -g clock-mode-colour green
+# Turn the clock red. It's the least bad colour especially at night.
+setw -g clock-mode-colour red