Well I've been testing out both Color and Colorista, and I've been very impressed with the 'Auto-balance' feature of both, where it automatically adjusts the colour balance based on how the whites should be.

Color figures it out itself, whereas Colorista gives you an eyedropper tool so you can select what parts should be white (clouds, trooper armour etc). I think I prefer the latter, as I doubt Color's method of guessing is infallable.

I'm not suggesting that this would be a totally effortless way of colour-correcting, but it certainly gives me a good starting point.

I've searched for a similar feature in vanilla After Effects, but have yet to find one.