Blue: Supporting USB 3.0 SuperSpeed technology and above, blue ports identify a device capable of fast data transfer: up to 5 Gbps (that's 5,000 Mbps) -- a significant jump from previous generations.
With just one cable, I don't need a cable for every device I have. It might not transfer power at the fastest speeds, but ...
Sony has a list of cameras that support USB-PD and states that fast charging requires at least 18W of power (9V over 2A).