Anthocyanins, is a flavonoid that are found in cannabis, they are the resson buds turn purple color.
Some strains produce more Anthocyanins than others. Looks like your plant is going to be a purple plant.
I hope this helps.
Hello. Your plant looks great. It's just got a purple trait that's showing up at the start of flowering.
I can see white pistils at the start of flowering and it looks happy. Grow it like you know it.
Chuck.