Part of the 'collar color' family modeled on English white-collar / blue-collar:
白领 (báilǐng) office worker,
蓝领 (lánlǐng) blue-collar worker,
金领 (jīnlǐng) high-end professional,
粉领 (fěnlǐng) female office worker.
红领 was coined to describe government and Party-system employees, with
红 ('red') signaling the political color.