Yes you will be able to move them okay! It's just the same as how some people's lips/ fingers/ toes turn blue when they're cold- nothing scary! Happens when you're cold or in this case running on insufficient oxygen, the blood vessels in your arms and legs will get teeny tiny to restrict the amount of blood hanging out in your fingers and toes. Instead it's gonna try to keep your blood circulating around the essential organs in your core to keep you alive. As said above, I expect you would lose consciousness before actually feeling much of anything