Applying --color shows `fg=black` instead of the color

[avatar-lavventura]

When I apply --colors I cannot see colors instead I see their ascii tag code. How can I fix this?

$ ./tmux-mem-cpu-load --colors
#[fg=black,bg=colour144]619/976MB#[fg=default,bg=default]#[fg=brightwhite,bg=colour16] [          ]  5.1%#[fg=default,bg=default]#[fg=brightwhite,bg=colour16] 0.14 0.21 0.33#[fg=default,bg=default]