CS 25.1397 Colour specifications
ED Decision 2003/2/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 ā
āyā is not greater than 0Ā·335; and
āzā is not greater than 0Ā·002.
(b)Ā Ā Ā Ā Aviation green ā
āxā is not greater than 0Ā·440ā0Ā·320y;
āxā is not greater than yā0Ā·170; and
āyā is not less than 0Ā·390ā0Ā·170x.
(c)Ā Ā Ā Ā Ā Aviation white ā
āxā is not less than 0Ā·300 and not greater than 0Ā·540;
āyā is not less than āxā0Ā·040ā or āyoā0Ā·010ā, whichever is the smaller; and
āyā is not greater than āx+0Ā·020ā nor ā0Ā·636ā0Ā·400xā; Where āyoā is the āyā co-ordinate of the Planckian radiator for the value of āxā considered.
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