Provided by: allegro5-doc_5.2.10.1+dfsg-1build1_all 

NAME
al_color_xyy - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro_color.h>
ALLEGRO_COLOR al_color_xyy(float x, float y, float y2)
DESCRIPTION
Return an ALLEGRO_COLOR(3alleg5) structure from xyY values. The Y component in the xyY color space is
the same as the Y in XYZ.
However the x and y values are computed from XYZ like this:
x = X / (X + Y + Z)
y = Y / (X + Y + Z)
SINCE
5.2.3
SEE ALSO
al_color_xyy_to_rgb(3alleg5), al_color_rgb_to_xyy(3alleg5)
Allegro reference manual al_color_xyy(3alleg5)