If they go numb through Raynauds, you can't always feel them as cold and the rest of my hands stay a normal colour as you can see, unlike Alibears. Equally, I find that bits that go numb behave similarly. I would suggest have a look next time as you say.
If they go Raynauds numb, you can restore circulation by doing windmills with your hands for a bit but long term might be better to see GP? I have some magic tablets that open up the blood vessels and stop it from happening.
I was at Stratford yesterday, looked out for you and Cake but didn't spot you though there was a blurred pirate in the water must have started about 09.05. Had my pirate jacket on but raced in a non pirate trisuit. Unless you are trying to tell me something!!!