I'm afraid it's done for. With no roots and the disease still affecting the stem, it will likely die, and if doesn't, it will take years to come back to flowering size, if everything is right. I've been there.
I grew orchids for a very long time before I got my first paphs and phrags. Basically, I considered paphs kind of ugly. I grew some, lost most of them until I settled on phrags and multifloral paphs. Now, that's very nearly all I have. :D
It's getting warmer now in the growing room, which probably explains why it's not as dark as before. This is the period between the heating and the cooling. I'll probably install the air conditionning within a week or two. There is also more light coming in from the eastern facing windows.
It is white. Must be the lignt coming from the window... or I screwed up.
Just checked the flower in natural light outside and there is effectively some green mixed with the cream.