Hi, Amiers...
Well, I'd certainly be able to accept that combination, especially as a sandgelb colour, perhaps RML79 or something approaching an approximation, was used on JG54's Fw190s. Aircraft operating out over the vast expanses of the Soviet Union used this type of colour quite frequently over the dryer, dustier earth-coloured ground, and oftentimes had dust filters fitted to them as well.
So, two hours, eh...? I've been at this for 37 years and I'm still asking questions...
. I hope you've enjoyed the hunt, though. I can think of worse ways to spend a Sunday afternoon.
I've put a link below for you. Perhaps you're researching a colour scheme for a model, I don't know, but if you scroll down to 'Messerschmitt' and pick out the 'F' version, you'll get a really good idea of some of the colours. There's also a JG3 Bf109F in a sand, grey and green non-standard 'splinter' scheme which I particularly like, and is a lovely example of the unorthodox.
Kindest regards...
http://www.hyperscale.com/features.htm