which paints are best to touch-up/correct the original ffg colours?

By Voogla, in X-Wing

just received my first batch of minis and although I like the paint jobs, I would like to touch up and correct in a few spots (I probably will not have the time do a full repaint). So my question is, what would be the best colors/paints to exacty match the original ffg colours (best without mixing)? I found somewhere else the suggestion to use Vallejo Khaki and GW blood red for the X-wing, but nothing so far for the Ties and Y-wings. Any suggestions welcome!