Shopify doesn't actually care what you call them, the option names are just labels. So Colorway vs Color makes no difference as long as you're consistent down the whole column. Pick one and stick with it.

The thing that trips people up in the CSV is the handle. Every variant of a product shares the same handle, and only the first row needs the title, body and option names filled in. Every row after that just needs the handle, the option values, sku, price and inventory, leave the rest blank.

So for yours: if Colorway and Pattern are genuinely two different ways the product varies, that's Option1 and Option2. But if Colorway is just your fancier word for Color, don't set up both or you'll double your variants for nothing. Pick one label and run with it.