Is gold forbidden for men due to its color or its metal? What is the ruling on white gold, and does the same ruling apply to it, given the existence of silver that resembles it in purity and luster?

Wearing gold is forbidden for men and permissible for women. Scholars have differed on the reason for its prohibition. Some said: The reason for the prohibition is extravagance and pride, and it was permitted for women due to their need to adorn themselves for their husbands. Others said: The reason is to avoid breaking the hearts of the poor and needy. We are obligated to submit to the rulings of the Sharia, whether we know the reason or not. Other metals are not to be analogized to gold. What is called "white gold," if it is real gold, is forbidden for men to wear; if it is not gold, it is permissible.