In the coverage of Trump’s Saudi visit I notice folks appear to wear differentiating colors. Some are in all white, others have black or gold and many have red checked scarves. I assume there is more to this than just style.
AFAIK its just style.
This. When I was working in SA I asked the same question. I thought it might be different religious sects or perhaps family affiliations, but I was told it’s just what color that person chooses to wear, and nothing more.