Highlights are a difficult part in digital photography because the image information gets blown out in highlights rather abruptly, as explained in the question, Why are blown highlights particularly bad in digital photography?

Briefly speaking: any RGB-value can only reach 255 and is capped afterwards, whereas in film a softer transition with more texture in white areas is possible. The linked example explains this for whites, but in your case you have to imagine the 3 RGB color-channels seperately. The area around your highlight can get these colour tints, if individual channels get 'blown out' i.e. capped at a value of 255 before the others. Ken Rockwell briefly touches this subject in his article, Adding Dynamic Range to Any Digital Camera, which might help you fix the problem.

You will have to watch your histograms while shooting and try to avoid any channel from getting blown out. This means you have to correct exposure while shooting, which will probably result in a slightly underexposed image which you can then brighten in post-processing. Not great, but the only workaround I know of. You'll have to decide, wether the barely noticeable effect is worth the effort.