Don't force color with neutral symbols

Does not work with every color scheme.

dotfiles/i3/config

   #      
   #        
   # ⓿ ❶ ❷ ❸ ❹ ❺ ❻ ❼ ❽ ❾
-  set $neutral  "<span foreground='#999999'></span> %title"
+  set $neutral  "<span></span> %title"
   set $runn     "<span foreground='cyan'></span> %title"
   set $pass     "<span foreground='lime'></span> %title"
   set $warn     "<span foreground='orange'></span> %title"
   set $italic   "<i>%title</i>"
   set $normal   "%title"
 
-  set $list     "<span foreground='#999999'></span> %title"
-  set $item     "<span foreground='#999999'></span> %title"
-  set $favorite "<span foreground='red'></span> %title"
+  set $list     "<span></span> %title"
+  set $item     "<span></span> %title"
+  set $favorite "<span></span> %title"
 
   bindsym Page_Up [workspace=__focused__] \
                         title_format $neutral; mode "default"