You may want to purchase these colours or add "some" of them to your palette. This is not neccesary.

• Cerulean Blue
• Cobalt Blue
• Prussian Blue
• French Ultramarine
• Naples Yellow
• Yellow Ochre
• Cadmium Yellow
• Lemon Yellow
• Burnt Umber
• Burnt Sienna
• Alizarin Crimson
• Cadmium Red
• Cadmium Orange
• Oxide of Chromium Green
• Veridian
• Permanent Mauve