y is not greater than 0.335; and
z is not greater than 0.002.
(b)
Aviation
green --
x is not greater than 0.440−0.320y;
x is not greater than y−0.170; and
y is not less than 0.390−0.170x.
(c)
Aviation
white --
x is not less than 0.300 and not greater than
0.540;
y is not less than x−0.040 or y0−0.010,
whichever is the smaller; and
y is not greater than x+0.020 nor
0.636−0.400x;
Where y0 is the y coordinate
of the Planckian radiator for the value of x considered.