Is there a blue raspberry

Is there a blue raspberry? What are the requirements to grow a Blue raspberry?

Is there a blue raspberry?

Blue raspberry is real fruit by the name Rubus occidentalis, neon pictures are not exactly the real fruit, some cultivars are light blue mostly dark some cultivars almost black.

Blue raspberry plants need cold winter, chilling hour requirements for bearing fruits, slight acid soil. Sun exposure requirements are sun to half shade. Water requirements average to big amount of water.