Yellow fogs are not illegal as long as the bulbs are DOT approved. You can run white and amber to the front and red and amber to the rear. In general to be DOT compliant. The yellow fogs I have are Sylvania and DOT approved.
lol i never said they were illegal or not, thats just the policy at work when we are designing lighting systems, yellow doesnt improve anything visually so they dont use them for task lighting, only signal/marker lights.







