14 CFR 27.1397
§ 27.1397 Color specifications.
United States · 14 CFR — Aeronautics and Space · Status: effective
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- Citation
- 14 CFR 27.1397, § 27.1397 Color specifications, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/54632
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Full text
Each position light color must have the applicable International Commission on Illumination chromaticity coordinates as follows:
(a) Aviation red—
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 yc−0.010, whichever is the smaller; and
y is not greater than x + 0.020 nor 0.636−0.400x;
Where yc is the y coordinate of the Planckian radiator for the value of x considered.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.