Rainbow ceiling, or pink ceiling, refers to business practices and prejudices that create an unseen and unofficial barrier to personal advancement for gay employees.

彩虹屋顶或粉色屋顶指同性恋员工在职场个人晋升过程中遇到的由职场惯例或歧视导致的无形的障碍。

For example:

Women have for years complained about the glass ceiling in the workplace. But gay and lesbians workers have to clear the pink ceiling as well.

多年来，女性一致抱怨职场遭遇玻璃屋顶，但是，同性恋员工在职场也会遭遇粉色屋顶。