al_map_rgb_f - Allegro 5 API

       Convert r, g, b, (ranging from 0.0f-1.0f) into an ALLEGRO_COLOR(3alleg5), using 1.0f for alpha.

       This function can be called before Allegro is initialized.

       al_map_rgb_f - Allegro 5 API

al_map_rgba(3alleg5), al_map_rgb(3alleg5), al_map_rgba_f(3alleg5)

Allegro reference manual                                                                   al_map_rgb_f(3alleg5)

              #include <allegro5/allegro.h>

              ALLEGRO_COLOR al_map_rgb_f(float r, float g, float b)