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§ 27.1397 - Color specifications.

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Each position light color must have the applicable International Commission on Illumination chromaticity coordinates as follows:

Aviation red—

y is not greater than 0.335; and

z is not greater than 0.002.

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.

Aviation white—

x is not less than 0.300 and not greater than 0.540;

y is not less than x−0.040” or y c−0.010, whichever is the smaller; and

y is not greater than x + 0.020 nor 0.636−0.400x;

Where y c is the y coordinate of the Planckian radiator for the value of x considered.

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§ 27.1395 - Maximum intensities in overlapping beams of forward and rear position lights.
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§ 27.1399 - Riding light.