my $var_v = $v / (13 * $l) + REF_V;
my $y = _l_to_y $l;
my $x = 9 * $y * $var_u / (4 * $var_v);
- my $z = (9 * $y - (14 * $var_v * $y) - ($var_v * $x)) / (3 * $var_v);
+ my $z = (9 * $y - (15 * $var_v * $y) - ($var_v * $x)) / (3 * $var_v);
Convert::Color::XYZ->new($x, $y, $z)
}