Black Capsicums

Hi All, I have three Capsicum plants in my greenhouse, all from seeds from the same packet, one has all green fruits on, on another some are yellow and some are red but on the third they are all as black as night - is this normal?
I have eaten some of the green ones and they are fine, but not any of the others as they are not very big yet, I don't feel inclined to eat the black ones though.

Thanks

Harry

 

They come in all colours, often changing as they ripen.
Green is usually unripe.
If you are sure its Capsicum the black ones will be ok to eat.