not the best picture I have of her, but here is an AF A. purpurea. @Seamus which illustrates the points that Casey was saying (I.e. mainly black with purple hues when in the right light)They do. The difference is:
Versicolor have green carapace with red setae. You will not see ANY red coloration or green coloration on Avicularia purpurea (male or female). They are mostly overall black/purple.