Monochrome is a value scale of a single color, ranging from light to dark. Imagine 11 different values of greyscale. Value 0 is white, 10 is black, and 5 is midway between. The other values are evenly spaced to show a progression from light to dark.
This greyscale bundle has all 11 values and comes to you from Robert Kaufman, including 11 fat quarters of Kona Cotton Solids: