Humm ... When I first looked to see what color the the side panels were on that machine, I saw an example that had a light blue / cyan color. This was also the color that they became when I used the color correction eye dropper in ACR on your image.
However, I just happened to notice that the machine also comes with side panels of other colors. These include white, cream, and even a rainbow like effect where each section has a different color. Since there was no MacBeth color checker included in your photo, I couldn't be sure which color your machine has, but no matter which it is, it's easy to change the color if need be.