As you can see in my photos below, the hydrangea flower on the plant named “Blushing Bride” is going through a change to green as it ages.
It started off white, then began showing cream or ivory colored petals mixed with the white. Now it’s taking on a definite greenish appearance.
However, if your soil alkalinity is different from mine, your Blushing Bride flower may be pink or blue. This is one type of hydrangea which has flowers that will be various colors according to the type of soil.