Do flammable cabinets have to be yellow?

Excuse me, I was just wondering about a safety regulation that I came across. The question is, do flammable cabinets necessarily have to be yellow in color? I understand that yellow is often associated with safety and warning signals, but is it a mandatory requirement for cabinets that store flammable materials? Or is there some flexibility in terms of the color choice, as long as the cabinets meet the necessary safety standards? Could you please clarify this for me?