I think that this can work in the real world if you have the right presentation.
For example, after you do a trick where you color change a card into their card (a normal color change) you can go:
Ok, now that was cool and all but some people get suspicious when i do that changing thing. They suspect that i'm manipulating the cards somehow. Like i'm putting it in my sleeve or something. So i'll show you that one again but this time i will make it really fair. I'll put this random card, along with the rest of the deck inside the box. Now, since the box is covering the cards, i cant touch the cards, therefore i cant manipulate them. So watch this card and concentrate on the card you picked......*change*....and there it is.
So you can make a color change look really clean with this change. That's just an idea, feel free to use it.