use something abrasive...like toothpaste.
It was a tip I used when I was an instructor.
I DON'T KNOW ANYTHING THAT WOULD REMOVE IT ONCE IT IS THERE, BUT TRY WEARING DISPOSABLE LATEX GLOVES NEXT TIME, THEN IT WON'T GET ON YOUR HANDS IN THE FIRST PLACE. IT WORKS LIKE A CHARM.
LOL, I have blueish red fingers right now! Got to love it, not 
I am going to try the toothpaste as well because I dont like wearing gloves...Good luck!
Well, my hot pink and black fingernails are just about faded out. I just washed really well with soap and soak in the tub. But also, when I was coloring my fondant, I put crisco on my hands and that helped a lot.
i had pink hands for last two days! it didn't even occur to me that kneading pink into my fondant would color my hands. (duh) it just gradually faded away though. ya know, old skin cells fall away and new ones replace them!
I use nitrile gloves. Latex makes my hands itchy and red, plus it stinks really bad. And those polyurethane gloves with the powder inside? Yuck! I love the nitrile, they don't smell, they fit, and they're not as sticky as other gloves. Here's a link where you can buy them for personal use.
http://www.coleparmer.com/catalog/product_index.asp?cls=7615
I have hot pink around the edges of my fingernails right now Wear it proud ladies - mine is from my little granddaughter's first b-day cake. I have thought about gloves and I agree latex stinks and I would think it probably tastes bad as well. I may have to check into the nitrile ones LittleMom wrote about.
I always rub a small amt. of Crisco on my before kneading color in by hand. It has always seemed to keep the color off. I have a small jar that I use solely for my hands. I also heard that shampoo will get it off better than plain soap. I haven't tried the shampoo b/c the Crisco seems to work for me.
Oh my God, I cracked up reading all these posts.
I too have had blood red stained fingers for the last two days.
I tried using hand cleaner for paint removal on hands, the one I have has some abrasive material in it so it acts like a good loofah scrub. It worked quite well but I just didn't do it long enough. I think a good long scrub with that will work just fine along with a fingernail scrub brush.
lsienna
I was going to search for this same topic this morning!!! I know people think I don't bathe since I have black under my fingernails. 
I always put Crisco all over my hands before kneading fondant, it works very well for me.
I use nitrile gloves. Latex makes my hands itchy and red, plus it stinks really bad. And those polyurethane gloves with the powder inside? Yuck! I love the nitrile, they don't smell, they fit, and they're not as sticky as other gloves. Here's a link where you can buy them for personal use.
http://www.coleparmer.com/catalog/product_index.asp?cls=7615
You can purchase the nitrile gloves at Walmart I buy them there all the time.
Just a word of caution to all those that are wearing gloves while coloring fondant. Many people have latex allergies and could become seriously ill if they ate your cake. The powder in the latex gloves is what gives most people a reaction so if you are going to wear gloves then use the nitrile ones or make sure you print a large warning somewhere on the box and tell your customers. This is comming from someone who has made one too many trips to the ER because of things like this. 
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