Made exclusively for Terry, this is a wonderful deep purple that creates a simple way to paint shadows and of course can be used to darken other colours, shadows are tricky but try Terrys ready mixed Artists Quality Watercolour Shadow to solve that problem.
Shadow is a non granulating colour, beautiful when applied as a thin  transparent wash over other colours to achieve the effect of a shadow. The colours underneath show through.
Also wonderful for mixing rich darks, try adding Terry's Midnight Green for a fabulous almost black colour. Add Shadow to the new Permanent Wild Rose to achieve lovely maroons and burgudy colours.

This is an Artists’ quality watercolour, Available in 14ml tubes.

Pigments - Copper Phthalocyanine, Monoazo, Cadmium Sulphoselenide. Permanence A. Opaque