Winsor Violet (Dioxazine) is a vivid mid-shade purple pigment. When undiluted, it can be used as a deep black. It is a transparent coal tar pigment and was introduced into the Winsor & Newton range in the 1960s.
Perylene Red is a light red pigment. Perylene is a modern synthetic organic pigment and was first available as a dye around 1912 before becoming available as an artist pigment in the late 1950s.
Winsor Green is a brilliant transparent green pigment with a blue undertone. It is made from the modern pigment Phthalocyanine which was introduced in 1930s.
Winsor Blue is a deep intense blue which when undiluted, forms an inky blue-black. It is made from the modern pigment Phthalocyanine which was introduced in the 1930s.
