I did a fair bit of research, (read that as I spent time at work trawling the net looking for photos!). What I discovered is that most operational planes had very little pink/red/blue, but were mostly plain brownish titanium colour. Like the Cutsall Hun and this Vietnam combatant.
There were exceptions though, this ANG Hun definitely has a purple/blue look. It seems to be operational when this pic was taken.
There are a lot photos of non operational planes showing colour.. I did read somewhere that is was quite common for service crew to change the titanium skin in the hot section..
So there seems to be a lot of variation, but I have to agree with Jetmaven, some of the RC "Scale" renditions I have seen are a bit cartoonish..