Blue hydrangea blooms turning white/green/brown

Question

I have a blue potted hydrangea bush that I think is Endless Summer (can’t remember what the pot said at the store) that had some brown spots in the leaves and one ball of flowers that looked like if was damaged from the sun but now the rest are starting to turn brownish. The leaves are vibrant and green still, though. I keep the soil moist and know it probably needs more acidity but what else may be going on?

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Answer 1

This article should help:
https://www.gardeningknowhow.com/plant-problems/environmental/fixing-color-faded-flowers.htm