Complex sentence: Traditionally, the intense colours of Hebron glass included dark and light blue, turquoise, dark red (Bordeaux), and light and dark green and these colours were produced using metal oxides, such as those from iron and copper.
Split into simpler sentences: Traditionally, the intense colours of Hebron glass included dark and light blue, turquoise, dark red (Bordeaux), and light and dark green. These colours were produced by adding metal oxides, such as those from iron and copper.