silver

Silver is a light but not excessively pale shade of gray, and is the most typical shade for many common metals, especially aluminum, stainless steel, zinc, silver, and titanium. Although the name of the color may suggest shininess, it may also be applied to rough materials with a similar color, including unpainted concrete as well as various forms of marble and granite.

Hex triplet: C0C0C0

A rough stone or concrete surface can have this color without metallic gloss. Platinum is a still paler gray shade. The hex triplet is a comparison sample for a range of similar facade colors, rather than an exact-match requirement.