Trailer clearance lights are red and yellow. If you’re towing a trailer that is wider than 2.05 meters, it must have a minimum of two red rear clearance lights and a minimum of two front yellow clearance lights.
What kind of side markers should I place on my trailer?
In Canada, all trailers are required to have a minimum of two rear side markers placed on each side at the rear as far back as practicable, and a minimum of two yellow front side markers placed on each side at the front as forward as practicable.