diff --git a/theme.tmux b/theme.tmux
new file mode 100644
index 0000000..1f815ba
--- /dev/null
+++ b/theme.tmux
@@ -0,0 +1,33 @@
+# Left status style
+if -b '[ "$WSL_DISTRO_NAME" != "" ]' \
+  'setw -g status-left " #(hostname)|#{WSL_DISTRO_NAME}|#{session_name}"' \
+  'setw -g status-left " #(hostname -s)|#{session_name}"'
+setw -g status-left-style fg=colour240,bg=colour233
+setw -g status-left-length 32
+
+# Centre status style
+setw -g status-style fg=colour240,bg=colour233
+
+# Right status style shows system info, date, and time.
+setw -g status-right "#[fg=colour240]#(cat ~/.cache/tmux/system-info)#[fg=white] %a %d-%m-%y %H:%M "
+setw -g status-right-style fg=white,bg=colour233
+if -b '[ "`uname`" != "Darwin" ]' \
+  'run "tmux setw -g status-right-length $((`nproc --all` + 48))"'
+
+# Active window status style
+setw -g window-status-current-format " #{window_index}: #{window_name}"
+setw -g window-status-current-style fg=white,bg=colour233
+
+# Inactive window status style
+setw -g window-status-format " #{window_index}: #{window_name}"
+setw -g window-status-style fg=colour240,bg=colour233
+
+# Pane border style
+set -g pane-border-style fg=colour233,bg=colour233
+set -g pane-active-border-style fg=colour235,bg=colour235
+
+# Command line window list selection
+set-window-option -g mode-style fg=white,bg=colour237
+set-option -g message-style fg=white,bg=colour237
+
+# vim: ft=tmux
diff --git a/tmux.conf b/tmux.conf
index c77230e..b1f01d5 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -145,34 +145,4 @@ if -b '[ "$WSLENV" = "" ]' \
   'bind -T copy-mode-vi y send-keys -X copy-pipe "xsel -i --clipboard"' \
   'bind -T copy-mode-vi y send-keys -X copy-pipe "win32yank.exe -i -crlf"'
 
-# Left status style
-if -b '[ "$WSL_DISTRO_NAME" != "" ]' \
-  'setw -g status-left " #(hostname)|#{WSL_DISTRO_NAME}|#{session_name}"' \
-  'setw -g status-left " #(hostname -s)|#{session_name}"'
-setw -g status-left-style fg=colour240,bg=colour233
-setw -g status-left-length 32
-
-# Centre status style
-setw -g status-style fg=colour240,bg=colour233
-
-# Right status style shows system info, date, and time.
-setw -g status-right "#[fg=colour240]#(cat ~/.cache/tmux/system-info)#[fg=white] %a %d-%m-%y %H:%M "
-setw -g status-right-style fg=white,bg=colour233
-if -b '[ "`uname`" != "Darwin" ]' \
-  'run "tmux setw -g status-right-length $((`nproc --all` + 48))"'
-
-# Active window status style
-setw -g window-status-current-format " #{window_index}: #{window_name}"
-setw -g window-status-current-style fg=white,bg=colour233
-
-# Inactive window status style
-setw -g window-status-format " #{window_index}: #{window_name}"
-setw -g window-status-style fg=colour240,bg=colour233
-
-# Pane border style
-set -g pane-border-style fg=colour233,bg=colour233
-set -g pane-active-border-style fg=colour235,bg=colour235
-
-# Command line window list selection
-set-window-option -g mode-style fg=white,bg=colour237
-set-option -g message-style fg=white,bg=colour237
+source-file ~/.config/tmux/theme.tmux