in the red 处于负债或亏损状态

处于红色状态 in the red 意思就是你欠银行钱了。当一个人或企业的财务出现赤字，那就意味着他们处于负债或亏损状态。

例句

Because the airline had to give everyone their money back after the delays, they now say they're operating in the red.

I've paid off most of my credit card bills - but I'm still in the red.

请注意

如果说一个人是 in the pink 粉色 ，意思就是这个人身体很健康。

Ruth looks very well - she's certainly in the pink.