Mine start pale pink then mature to red. The foliage goes red in autumn. It's a great ground cover plant but it can get tatty in winter. However, come spring, just remove the dead leaves with your fingers or a gentle rake, give it a handful of pelleted chicken manure or BF&B and water it in very dry spells and it will be bonny again.
Vendée - 20kms from Atlantic coast. "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
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https://www.bethchatto.co.uk/offer/persicaria-amplexicaulis-rubie-s-pink.htm
While Persicaria affinis has deep pink and pale pink flowers as seen in Eustace pic.
https://www.gardenersworld.com/plants/persicaria-affinis/
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw