Can this be applied to an electric piano to get a similar type of colour in the sound?
Every electronic "stage" piano I've owned has had an option to modify the tuning, at minimum allowing you to choose between equal, well, meantone, pythagorean.
I remember one Yamaha I owned even had the option to customise the tuning yourself. Can't remember the model number, it cost a decent-ish chunk of change, around 800 GBP about 15 or so years ago.