It could well be lighting and white balance. It's not easy to get colors shown correctly on a monitor. I battle with it every day when taking photos of random things I paint, my animals, and in general. I have to tweak images to get the colors right, even after tweaking white balance on my camera. I take a photo of something green and it looks blue-green--as an example--before I do anything to it. Calibration is a big factor, but then also my display may be calibrated differently from yours, so we won't see that Traffic red the same way.