Marla is made from 2 strands of lighter-weight yarn that have been dyed separately and then plied together. When worked, Marla creates a marled fabric, where the colors are uniquely distributed.
The resulting marled yarn can be high-contrast tweedy (like Twilight), or more subtly Tonal (like Nube), or even have some of each in the same colorway, like Marino.
The Marla palette is connected directly to the Sami palette - they coordinate with each other to make gorgeous color pairings!