I'll see what I can find in my library - might have some colour shots too. Basically, the RAAF and RAF were 'supposed' to wear tropical dress, but tended to wear what suited the job, what as comfortable - and available.
The colour started out as a sort of 'sand' coloured gabardine, not unlike the colour used by the Boy Scouts up until the 1970s, and was basically the same as worn in the MTO. Of course, due to the climate, colours soon varied enormously !
EDIT: I've found a few colour shots, some of which are in the MTO, but the dress was very similar. Is your e-mail address still the same? If so, I'll send them that way, as there are probably copyright restrictions.