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.

“灰领”工人(grey-collar worker)指业务熟练的技术工人，尤指那些兼具白领和蓝领工作性质的行业从业人员，比如IT(信息技术)业工作人员。他们本质上是白领，但经常会做一些蓝领性质的工作。

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.

“黄领”工人(yellow-collar worker)则指创意产业的工作人员，比如摄影师、电影制作人等等。他们有时候可能在做白领和蓝领性质的工作，而有时候干的活却不属于任何一个“领”域。