-# %{+b}%{+r}[%n%f%t]%{-r}%{+b}
-# Show name, flags and title in bold reverse.
+# %?%F%{+r}%:%{= Kw}%?[%n%f%t]%{-}
+# Show name, flags and title in bold reverse if the window is active.
+# Otherwise show them in white on high intensity black, which turns out grey.
+# Afterwards pop the colour stack so the following information is as before.