al_unmap_rgb - Allegro 5 API

       Retrieves components of an ALLEGRO_COLOR, ignoring alpha.  Components will range from 0-255.

       This function can be called before Allegro is initialized.

       al_unmap_rgb - Allegro 5 API

al_unmap_rgba(3alleg5), al_unmap_rgba_f(3alleg5), al_unmap_rgb_f(3alleg5)

Allegro reference manual                                                                   al_unmap_rgb(3alleg5)

              #include <allegro5/allegro.h>

              void al_unmap_rgb(ALLEGRO_COLOR color,
                 unsigned char *r, unsigned char *g, unsigned char *b)