14 CFR § 29.1397 - Color specifications.

---
identifier: "/us/cfr/t14/s29.1397"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 29.1397 - Color specifications."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "29.1397"
section_name: "Color specifications."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "AIRCRAFT"
part_number: "29"
part_name: "AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704."
regulatory_source: "Docket No. 5084, 29 FR 16150, Dec. 3, 1964, unless otherwise noted."
cfr_part: "29"
---


# 29.1397 Color specifications.

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 0.440−0.320*y*;

*x* is not greater than *y*−0.170; and

*y* is not less than 0.390−0.170*x.*

(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 *y*<sub>c</sub>−0.010, whichever is the smaller; and

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

Where *Y*<sub>e</sub> is the *y* coordinate of the Planckian radiator for the value of *x* considered.

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-7, 36 FR 12972, July 10, 1971]