I must admit when I saw the very green colour of Smashbox Photo Finish Colour Correcting Adjust I was quite sure it would turn my face a sickly shade of green :/ But it didn't at all! It disappeared as soon as I applied it, and within seconds those horrible red marks that are the remains of a breakout.. were less red and less noticeable!
It also created a perfect canvas for foundation, its silky smooth finish allows foundation to apply easily and smoothly. It also seemed to make my foundation last longer.
It is expensive but if you have problems with redness of any kind on your face it is worth it and it will last a long time as a little goes a long way :)