Oregon Revised Statutes Oregon Vehicle Code § 816.280

(a) Public vehicle warning lights, pilot vehicle warning lights and commercial vehicle warning lights shall be amber.

(b) Tow vehicle warning lights may be amber or red.

(c) Weighmaster and motor carrier enforcement officer warning lights shall be red.

(d) Warning lights on vehicles engaged in the removal, containment or cleanup of a hazardous materials release, and on vehicles at the scene of a potential release of hazardous materials, may be red or amber.

(e) Warning lights on vehicles being used by medical examiners to reach the scene of an accident or of a death investigation may be red.