If you haven't read this book yet (why?) and intend to read it in the future, click the back button NOW because I wasn't joking about the spoilers thing. Should you be reading on despite the warning, you forfeit all right to blame me for loss of enjoyment and/or suspense when finally reading Shades of Grey.
Okay. Now back to our scheduled comment:
The Fallen Man - I thought he might have been a
Paramotorist. Planes would have been leapbacked so hard, I don't know how he could have been a pilot.
Otoh, I get the feeling that the Collective is fairly ... localised. I don't think the whole word is a Colourtocracy; rather that it is some kind of highly protected reserve - possibly the size of Wales, maybe even as big as the British Isles. In this case, the Fallen Man might very well be a pilot from the outside.
If we run with the "reservation" idea, then I wonder where one would find Big Brother. Inside or outside? It seems that National Colour is definitely playing the part of Secret Service on the inside. But where exactly is Head Office? And who runs it? Is there even a Head Office anymore or has it maybe disbanded (due to the Something that Happened?) and the Colourtocracy runs on the lie that H.O. is still there? ... Hey, this is crazy theories time, right?
Furthermore, and I'm still wildly theorising here, this selective colour seeing thing is a very weird mutation/development. Could it be a science project ("Gene Manipulation 101" or something like that) gone horribly wrong or, if the aim was to up the perception of colour, overly right? Dilation of pupil is still possible for some, so Nightseeing might be due to a recessive gene. Though the fact that said dilation happens apparently at will, points to some mutation of that as well.
Okay, last but not least, what I would like to see: Eddie marries Violet and becomes a purple in name. Violet dies. Eddie marries Jane. Thank you. That is all.
(I liked the book - in case you couldn't tell.)