The inspiration to wear a cozy marled knit this week is from the GAP. Currently they offer several styles in black and white marl.
I think that black and white marled knits look best with black, white, or denim separates, and maybe a pop of red during the holidays. That said, I have enough tops and pants in each of those colors to create several outfits with the same cardigan.
My sweater is J.Crew's Snowden funnelneck sweater-jacket. It's from a few years ago. The chunky knit makes it a great topper for snow days. I'm also thinking of adding GAP's cotton Marled shawl cardigan to my closet for early spring.