I'm not an expert on the subject, but I think that recessive genes usually start showing up more in F2 and later generations. You may try collecting seeds from your F1 seedlings and see if any weird genes start showing in further generations.
Also, not exactly what you had in mind, but there is a new variety coming out that color shifts from cream to a pinkish-orange. It's called 'Strawberry Blonde'. The photos look really pretty and it might have some fun genes to play with in breeding.
http://www.panamseed.com/plant...
