Are gray potatoes okay to eat?

I figured some of you out there would know this and thank y'all for any information you might have :-)

I peeled and cut three potatoes on Sunday so I can make curry tomorrow night, but I stored them in tupperware without any water. When I looked at them tonight, the potato chunks were covered in a grayish tinge. The Internet tells me this is due to oxidation, but says nothing about whether they are fit for consumption. Does anyone have any experience with potatoes that have turned gray?