I also associated the Contessa's violet eyes with power and status (and wealth). Liz, I also assumed Celeste's green was to represent her inexperience. It suggests something fresh and natural to me as well. But I began to think of as being like the traffic light as with ladylinn's comment earlier. To me it represents green for go, as in rush right in where angels might fear to tread. Chang to me seemed to be the opposite. It suggests danger but I also thought that the traffic light red was like his nature - to stop and think and weigh up before proceeding, and the way he reponds to the warnings that occur to him.
I mainly associate Svenson with being depicted mainly in monochrome. This is because the first colour is the ice-white of his hair. I think maybe it is only later that the "restrained Prussian blue" of his coat is mentioned, so I think of it as being not so crucial. With the silver buttons and black boots he is pretty colourless. It's appropriate for someone whose role has been essentially a servant to be unobtrusive in that way. It represents the way his work has become a "welcome sort of self-annihilation". And it also suggests to me the way he is a moral figure in the story. So Liz, I agree with you. And I think the ice-white of his hair connotes not only his morality but also the way he has been frozen in grief for so long.
DIDHOT, I do very much think of the white masks and so forth as being used in a pseudo religious way. The machine room I think is compared with a cathedral. And I’m sure I remember some talk along the lines of the people giving up their sin to attain paradise with the Process being sold as like a baptism or something.
As for the blue glass, I agree with the comments made already. But blue is also a term for adult content. Essentially, those blue cards and books are showing blue movies.
I imagine the film interpretation of this book to be very much Tim Burton's sort of thing, in terms of the colours. Lots of monochrome with dashes of vivid saturation. Sorry to stray into another possible question - I am thinking only in terms of colours here. It's just how I imagine it.
"Luck... inspiration... both only really happen to you when you empty your heart of ambition, purpose, and plan; when you give yourself, completely, to the golden, fate-filled moment."