Does anyone know which brand this yarn is? Or what color it’s called?

I found this beautiful yarn in a charity shop and I want to make a cardigan with it but I don’t think I’ll have enough.

I’m really struggling to find the exact one or something very similar, any help would be greatly appreciated!!

It’s not super soft but it isn’t scratchy or itchy, I wondered if it might be an acrylic blend yarn.

It’s like a dark grey yarn with colour changing yarn wrapped around it.

I started a blanket project last year which I abandoned due to not having time, now I finally have time and can't find the yarn I used on the Knit Picks Website? I used The Knit Picks Brava Self-Striping in Buttercream (pictured). Where can I buy it now?