be in the black
（账户上）有钱，有盈余
所以老外说“I'm in the black”意思是“我有闲钱了”
这里要重点提一下：in black 和 in the black 的区别：
in black=穿黑衣服
I am dressed in black today.
我今天穿的黑色衣服。
in the black=有盈余, 没有负债
例句：
I wish my accounts were in the black.
真希望我的账户里有钱啊。
We moved the company into the black.
我们使公司扭亏为盈。