Blue is something the Kush 4 was known for, but not tennis ball or rubber smells afaik. Who knows? Here’s bodhi’s quote from Breedbay about the Kush 4:
When I tested bodhi’s Kush 4 x OMG, I didn’t get any rubber or new shoes smells. Definitely did get some lemon lime and cologney OG / piney sweet kush scents tho. It bore no resemblance to the TK crosses I’ve smoked, but who can say for certain.
One thing IS for certain - this plant will surprise you! Just when you think you’ve created the ultimate, you’ll get something completely out of left field. I love how wild and wily it is!