can black potatoes be green?

[gwynleg]

Having just chopped the tops off my blight threatened black heritage potatoes, there were a few lying on the surface. Now if these were other potatoes I would throw away as they would be green/poisonous from being in the light. These  certainly dont appear to have green bits .....
Any experience?

[gwynleg]

[Robert_Brenchley]

The green is probably masked by the black pigment.

[pumkinlover]

Hmmm I was wondering the same thing?