Whitish-Greenish-Bluish-Pinkish?

I have written about my love affair with the white re-blooming hydrangea called 'Blushing Bride'. I have it a number of places in the garden and all of the shrubs are consistent as far as their color and appearance goes, with the exception of this one. For some odd reason it shows a little green (see the back bloom hiding under a leaf), a little blue and a little pink. I can't think of a reason for this other than maybe it gets a little more light than the others or maybe I put something in the soil while the new bed was being prepped. Either way I still love it!