US lawWashingtonRegulationsTitle 468 — TRANSPORTATION, DEPARTMENT OFChapter 468-240 — OBSTRUCTION MARKING AND LIGHTING468-240-135WAC 468-240-135WAC 468-240-135. Color of lightingLast amended: 1996Year: 2026Length: 15 wordsOfficial source The signal emitted by hazard beacons and obstruction lights shall be aviation red in color.PreviousWAC 468-240-130NextWAC 468-240-140