Tungsten's natural color is grey.

Tungsten wedding rings are incredibly scratch-resistant, but if you get one in a color other than pure gunmetal gray, the coating may scratch away, revealing the underlying tungsten hue underneath. Colored tungsten is tungsten that has been ion plated with other metals that aren't nearly as robust or scratch-resistant as tungsten, so choose your tungsten color carefully and consider your lifestyle. Do you want to be safe? Choose a tungsten wedding band in natural grey.

1 Things You Should Know About Tungsten Wedding Bands