I've been searching a lot but I can't find anything useful, the only answers I found were on how to change the opacity of an image using a .bat file. I just found out recently that you could change the opacity of the CMD window under properties, I want to know if you can do the same in a batch file using just a command.
You'll have to wait for windows 10.
Meanwhile you can console2.It's an enhanced console for powershell and cmd.exe. And some other alternatives.