I made these for my youngest grand children recently. The pink yarn and the rust is the same stuff. I dyed the pink with black cherry kool-aid for a boy color.
Pattern is Patons Child’s Long Stockings. I followed it pretty closely on the pink but used Cat Bordhi’s new Sweet Tomato Heel. On the boy’s pair the changes I made were just to make them a bit shorter and to use contrast cuff, heel, and toe.