const Chromaticities &
acesChromaticities ()
{
static const Chromaticities acesChr
(V2f (0.7347, 0.2653), // red
V2f (0.0000, 1.0000), // green
V2f (0.0001, -0.0770), // blue
V2f (0.3200, 0.3350)); // white
return acesChr;
}
but these were revised as the ACES document was finalized (http://stcatp.org/, join, and when accepted go to the Downloads folder). The new ACES neutral chromaticity is now x = 0.32168, y = 0.33767; and for what it's worth, the primaries are spec'd to five places to the right of the decimal, matching the precision of the neutrals.
{
static const Chromaticities acesChr
(V2f (0.73470, 0.26530), // red
V2f (0.00000, 1.00000), // green
V2f (0.00010, -0.07700), // blue
V2f (0.32168, 0.33767)); // white
return acesChr;
}