White Hellebore turned pink!

in Plants
Hello there. As you'll see from the header of my post, my white Hellebore, whilst seeming to be flowering well at the moment, has turned from white to pink! I don't mind; I bought a Hellebore for the early bees and I'm sure they won't care what colour it is! - but I wondered if anyone else has had this before and perhaps the reasoning for it?! Thank you in advance.

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In the sticks near Peterborough
I live in west central Scotland - not where that photo is...
In the sticks near Peterborough