CS 29.1397 Colour specifications
ED Decision 2003/16/RM
Each position light colour must have the applicable International Commission on Illumination chromaticity co-ordinates as follows:
(a)Ā Ā Ā Ā Aviation Red:
āyā is not greater than 0.335; and
āzā is not greater than 0.002.
(b)Ā Ā Ā Ā Aviation green:
āxā is not greater than 0.440ā0.320y;
āxā is not greater than yā0.170; and
āyā is not less than 0.390ā0.170x.
(c)Ā Ā Ā Ā Ā Aviation white:
āxā is not less than 0.300 and not greater than 0.540;
āyā is not less than āxā0.040ā or āyoā0.010ā, whichever is the smaller; and
āyā is not greater than āx+0.020ā nor ā0.636ā0.400xā.
Where āyoā is the āyā co-ordinate of the Planckian radiator for the value of āxā considered.