I'm a chemist from fields far removed from this. That said, a "simple" color change like white to yellow can signal far greater chemical changes than you'd naturally assume. The problem being we don't truly see yellow and it can mean far more than a seemingly small change in other colors we experience directly. It could also mean nothing, but when it comes to food, an even minor seeming colour change in a chromatic domain we cannot perceive properly is something worth taking into account and pausing to invesitgate before switching. It's worth understsnding color is chemistry and even a small change means something has changed, sometimes in a will kill you way, other times in a means nothing way,(even if a lack of color change does not imply nothing changed, since we see nearly no colour in the space of things the EMS can display). So, without further testing and credible evidence explaining it being benign, that change in colour registers as alarming to me.