Lets use our brains here... if it replaces a sabre (I'm assuming it does.. really haven't looked) can you still see the sabre? HMMMMM..... (Sorry if I'm sounding like an *** here.. >.>)
haha come on think a little bit before asking questions
If you look
here you will see that you can select a green cray on with a blue light sabre or red crayon with the red lightsabre etc. etc. (
Click here for the exact image I'm referring to)
Also in the text on the page...
Hope this helps :P