Those are all grey, as far as I can see; the chassis seem the same colour. When they were repainted orange, the chassis remained grey, but this might show up as a separate colour. Once repainted in orange, the CIE logos became black and these can't be seen in this picture.
It's not a very clear picture as far as the wagons are concerned, so we can't be sure.
As far as the changeover from grey to orange is concerned, it would have been about 1970, as far as I remember.