If you talkin' about 'Black Sea' (Geographically speaking) ... yes is black indeed... especially between day and night... sometimes is scary! (But when Moon's shining it feels safe. You can see actually the bottom of the sea.) Looks somehow like your creation!
not really (i wish, from your description, would be very challenging to shoot) I was just referring to the mood of the image, and the fact i took it when the night was falling. in fact it is the Mediterranean sea.