What is the Yellow Driver Rickie Fowler is Using in 2019?

Rickie Fowler has the Cobra KING F9 SPEEDBACK in the back for the 2019 FedEx Cup season. We will see him use it at the end of 2018 and throughout all of 2019. It looks like a neon yellow or light green when he takes the clubhead cover off to tee it. Here it is: