ncurses transparent console background

Question

My console has transparency enabled, when I run other ncurses apps, I see the the background stays transparent. I'm trying to make my app keep the transparency and not apply a dark black opaque background.

This is what I'm doing so far

start_color();
init_pair(1, COLOR_GREEN, COLOR_BLACK);

attron(COLOR_PAIR(1));
mvprintw(10,10, "Hello");

refresh();
attroff(COLOR_PAIR(1));

Any ideas?

Thanks