My mum was as cold as marble when I got to her (no more than 90 minutes after she collapsed). She ran cold anyway bless her and my sister said she felt cold before she collapsed. But there wasn't any warmth or colour to her.
She still looked beautiful though. Small, pale but utterly peaceful and serene (yep even with a tube in!!)
My dad and sister went to see her about 3 weeks after she died (we had a long delay with PM etc) but I knew the moment I saw her body I was never going to see her again after she was taken by the undertakers.
That's another weird thing about it all. Until I walked into the living room, I didn't know she was dead. I mean I knew it was touch and go but noone ever said to me "she is dead"
I'd got the call at 11.55am that she was being resuscitated (she collapsed at 11.30am and my dad and sister worked on her for approx 15 minutes). My sister and dad were already there with her... One brother lives close by and was off work that day so he went straight round and I had to get someone to have my kids / waited for my other brother to collect me in a cab. We got to the house at 12:45pm and I still thought she was alive. I knew she probably wouldn't live given the gravity of it all but I thought she was still alive?
I walked into a room to find her dead on the floor. My sister was holding her hand.
Walking past several paramedics and seeing all the equipment on the landing should have been a clue that she was gone.
It wasn't a shock as such that she didn't make it. Taking that gasping call from my sister said it all really.... but i'd had some misinformation that mum was being taken to hospital? So my MIL who came to have the kids and is a retired nurse said they'd not try to move her unless they'd stabilised her.
Reality is my brother on the scene had misunderstood what had been said and told me that she was being moved when they'd said she can't be moved.
A little lightheartedness... I text MIL after I arrived:
"She was already gone when I got here" and a few hours later MIL text back and said "any news on your mum?"... yep she thought I meant she had already "gone to the hospital" by the time I got there.... 
I stopped using the term "gone" after that little ambiguity...