Right then, *vigourous knuckle cracking sounds*, Robert's challenge has stood long enough! Here we go:
Philosopher's Stone: Harry -
Emerald, Ron -
Maroon 
, Gred & Force -
Blue with
yellow letters, Percy - not sure.
Chamber of Secrets: Not sure about the colours, except Ron -
Maroon
Prisoner of Azkaban: Harry -
Gryffindor colours with a Lion, Ron -
Maroon :

Goblet of Fire: Harry -
Green with a Dragon, Ron -
Maroon 
Order of the Phoenix - not sure again, but Ron -
Maro-

PS: I realise Maroon isn't actually orange in colour, but orange/brown is my colourblind area - so it looks like that to me!

Aha! How do you like them apples (or fruit of your choice)?
And so, a question, and hopefully as tricky as Robert's:
What is the proper name for the amazing save Ron pulls off in one of the Quidditch practices? (And, in what form should it never be attempted?)
Christmassy wishes to you all - and jumpers of a dubious colour!