Sorry for late reply, I didn't see your edit.
ricm:
I still need to work out how to dereference the struct to derive the individual rgb values. Suggestions?
I don't understand what you mean, explain better, with pseudo code for example 
Sorry for late reply, I didn't see your edit.
ricm:
I still need to work out how to dereference the struct to derive the individual rgb values. Suggestions?
I don't understand what you mean, explain better, with pseudo code for example