The word “gold” may evoke images of yellow sunshine, and pure gold is, indeed, reddish yellow, but depending on the type of alloy used, gold can be produced in a rich variety of colours, from purple and blue to rose and green. Malleable alloys with silver and copper produce white, yellow, green and red golds. Intermetallic compounds create primarily blue and purple golds. These compounds are often brittle but are sometimes used as inlays.