Hope you're not complaining!! LOL I'd love to have that!!Gorgeous.But sorry i don't have an answer for you.
Kathi

Very unusual. Is it grown in shade as the leaves lack the zones.

Greenlarry, It is in full sun until about 2pm, then starts receiving some shade.

It could be a sport. In that case, the 'odd' flowers have either reverted to the parents or are different plants. I would take cuttings from the stalks with the odd flowers on and when the cuttings flower, cut off any flower stalks that revert to the original Confetti plant. Cut them back right where they join the stem though.

Callum

Thanks, Callum, I will.
Jim

I have one geranium plant have the same phenomena, different colors on the same plant but watching it reveals that the same flower change the color when aging, so if you have a fresh one, and a one week flower and two weeks flower they will look different in color, try watching them