come off, peel, fade, discolor
剝 centers on removing an outer layer or surface: peeling, stripping, or coming off. The fade and discolor senses are natural results of a surface wearing away.
剝 combines 彔 (a component associated with carving or stripping) and 刂 (knife), suggesting the action of cutting or peeling away a surface. The exact historical development of the left component is uncertain.
The left side 彔 looks like a hand holding a tool, and the right side 刂 is a knife. Picture using a knife to peel off a layer, causing the surface to fade or discolor.
For ハク, imagine peeling off a hacky sack's outer layer: hack -> ハク, and the knife 刂 strips it away.