I don't see how you could call this particular circuit a colour organ.
The colour organs of yesteryear used a small transformer for input step-up and isolation, the signal then being passed through several adjustable filters to an output stage, which was sometimes triac based, but more often scr based.
There is no way to drive your circuit from line levels unless you add a gain stage to the input, this could be an opamp, or a transistor solution, either way of course you will require to power it.