Why do my Yellow skinned potatoes have red color where sprouts are?

The red color appearing where sprouts grow on your yellow-skinned potatoes is likely due to the presence of anthocyanins, which are pigments that can develop in response to environmental stress, such as light exposure or damage. These pigments can accumulate in the tissue around the sprouts, resulting in a reddish hue. While the sprouted potatoes may still be safe to eat, it's best to remove the sprouts and any affected areas before consumption.