---
title: "CS ADR-DSN.U.925 – CS ADR-DSN.U.940: CHAPTER U — COLOURS FOR AERONAUTICAL GROUND LIGHTS, MARKINGS, SIGNS AND PANELS (Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes) — rule index · Avioverse"
description: "CS ADR-DSN.U.925 – CS ADR-DSN.U.940, Regulation (EU) No 139/2014. The specifications in this Chapter define the chromaticity limits of colours to be used…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights"
---

# CHAPTER U — COLOURS FOR AERONAUTICAL GROUND LIGHTS, MARKINGS, SIGNS AND PANELS

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Aerodromes · Regulation (EU) No 139/2014 · CS ADR-DSN.U.925 – CS ADR-DSN.U.940

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1. ## [CS ADR-DSN.U.925 General](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/cs-adr-dsn-u-925)

   The specifications in this Chapter define the chromaticity limits of colours to be used for aeronautical ground lights, markings, signs, and panels.

2. ## [GM1 ADR-DSN.U.925 General](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/gm1-adr-dsn-u-925)

   It is not possible to establish specifications for colours such that there is no possibility of confusion.

3. ## [CS ADR-DSN.U.930 Colours for aeronautical ground lights](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/cs-adr-dsn-u-930)

   The chromaticity of aeronautical ground lights with filament-type light sources should be within the following boundaries:

4. ## [GM1 ADR-DSN.U.930 Colours for aeronautical ground lights](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/gm1-adr-dsn-u-930)

   The chromaticity for ground lights with filament-type light sources, where dimming is not required, or where observers with defective colour vision…

5. ## [CS ADR-DSN.U.935 Colours for markings, signs and panels](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/cs-adr-dsn-u-935)

   The specifications in surface colours given below apply only to freshly coloured surfaces.

6. ## [GM1 ADR-DSN.U.935 Colours for markings, signs and panels](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/gm1-adr-dsn-u-935)

   intentionally left blank

7. ## [CS ADR-DSN.U.940 Aeronautical ground light characteristics](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/cs-adr-dsn-u-940)

   \[Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure U-5.

8. ## [GM1 ADR-DSN.U.940 Aeronautical ground light characteristics](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-u-colours-for-aeronautical-ground-lights/gm1-adr-dsn-u-940)

   intentionally left blank

Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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