gruvbox color scheme for tmux

tmux-theme-gruvbox.conf

# This tmux statusbar config was created based on gruvbox colorscheme

set -g status "on"
set -g status-justify "left"
set -g status-left-length "100"
set -g status-right-length "100"
set -g status-right-attr "none"
set -g status-attr "none"
set -g status-utf8 "on"
set -g status-left-attr "none"
set -g pane-active-border-fg "colour248"
set -g pane-border-fg "colour238"
set -g status-bg "colour237"
set -g message-fg "colour237"
set -g message-bg "colour248"
set -g message-command-fg "colour237"
set -g message-command-bg "colour248"
setw -g window-status-fg "colour237"
setw -g window-status-bg "colour214"
setw -g window-status-attr "none"
setw -g window-status-activity-bg "colour237"
setw -g window-status-activity-attr "none"
setw -g window-status-activity-fg "colour248"
setw -g window-status-separator ""

set -g status-left "#[fg=colour248,bg=colour241] #S #[fg=colour241,bg=colour237,nobold,nounderscore,noitalics]"
set -g status-right "#[fg=colour239,bg=colour237,nobold,nounderscore,noitalics]#[fg=colour246,bg=colour239] %Y-%m-%d  %H:%M #[fg=colour248,bg=colour239,nobold,nounderscore,noitalics]#[fg=colour237,bg=colour248] #h "
setw -g window-status-format "#[fg=colour237,bg=colour239,noitalics]#[fg=colour223,bg=colour239] #I #[fg=colour223,bg=colour239] #W #[fg=colour239,bg=colour237,noitalics]"
setw -g window-status-current-format "#[fg=colour239,bg=colour248,:nobold,nounderscore,noitalics]#[fg=colour239,bg=colour214] #I #[fg=colour239,bg=colour214,bold] #W #[fg=colour214,bg=colour237,nobold,nounderscore,noitalics]"

How do you get the arrows to show in the status bar? The special characters don't seem to be coming through for me in the last 4 lines.