Grey-collar worker refers to a skilled technician,typically someone who is both white and blue collar, i.e., Information Technology workers. They are principally white collar, but perform blue collar tasks with some regularity.
「灰領」工人(grey-collar worker)指業務熟練的技術工人，尤指那些兼具白領和藍領工作性質的行業從業人員，比如IT(信息技術)業工作人員。他們本質上是白領，但經常會做一些藍領性質的工作。
Yellow-collar worker is people in the creative field, namely photographers, filmmakers, etc. They may spend time doing both white and blue collar tasks as well as tasks outside eithercategory.
「黃領」工人(yellow-collar worker)則指創意產業的工作人員，比如攝影師、電影製作人等等。他們有時候可能在做白領和藍領性質的工作，而有時候幹的活卻不屬於任何一個「領」域。