Syntax highlighting issue

[drzel]

I have the following string in .tmux.conf

set-option -g status-left "#[fg=black,bold]#{?client_prefix,#[bg=magenta] PREFIX ,#{?#{==:#{pane_mode},copy-mode},#{?selection_present,#[bg=brightcyan] VISUAL ,#[bg=cyan] COPY },#{?#{==:#{pane_mode},clock-mode},#[bg=blue] CLOCK ,#[bg=green] INSERT }}}"

Highlighting looks broken: