Meaning Of Selangor Flag. These two symbols are distinct from each other in style. The flag and emblem of selangor are state symbols of selangor, malaysia. The yellow sections refer to royalty, represented by the local monarchy of selangor, and the sultan, who is the head of the state. The official religion of selangor is islam, and that is denoted by the white crescent and star on the top left corner of the flag.