Plants can get a golden hue from cold exposure, it's a healthy response most of the times. I don't know this species so I don't know if it should.
Ficus does it too, but that means it's dead. Junipers do it too, in their case it's normal. A winter hardy plant species showing this hue is not an issue. If a non hardy plant does it, it's a bad sign.
Keep in mind though that things can stay green in the fridge for a long time and that a bark scratch is not the best test in this case; it shows cold preservation instead of livelihood.