Sorry but it's a total shot in the dark to identify the cultivar or the colors at this point. Plus it also appears to be grown from seed which may or may not follow the parent plant characteristics. When it does bloom please post a picture you may have something very new and unique.

EDIT: scratch that seed thing. I relooked at the pictures and now it looks to me like it was from a cutting.

I don't know what a bloom casing is. Do you mean the 'outside surface' of the petals when it is still in bud stage? If so, then no, you could never know for sure. 'Aztec Gold' has light pink buds, and yellow blooms. 'Psycho' has pink to reddish buds and white blooms.