wow that is cool .. i had the same thing happen to me with a variegated Sweet pea .. beautifull creamy yellow and green.. it was the only plant out of all of them thatcame up variegated .. and these ones are perrenial .. it was pretty ..
I took alot of pics .. waited for it to flower .. and it did .. waited for it to go to seed and it did . and i collected the seeds from it .. now i have to wait till next year to see if it comes back true to form from the seeds..
and you will probably have to wait till next year to see if it comes back the same color .. it has to stay stable ..
here is a link to Plant Patent info ..
http://www.plantpatent.com/
good luck and Congrats ..
Marn