I recommend alternating skeins every few rows so that the colors blend properly. I know it’s a pain but you will be so much happier in the end. Do it for your sanity and your finished object.
Also, though technically true that superwash bases are machine washable on a gentle cycle, why not be kind and hand wash them? They’ll last longer! You’ve spent time and money to create your beautiful new object. It deserves a little extra love and care! Always wash with cool water and lay flat to dry.
Also, also, I’ve tried really hard to photograph the yarns so that the color shows correctly. Unfortunately, you all can’t look at the lovely pics on my monitor. If you are unsure about a color/have questions please let me know. I will be happy to help!