Be in the black
Definition 1 of 1
Pro Tip 1/3Financial Health
Used to express positive financial status without specifying amounts. 
Despite the economic downturn, our company is still in the black.
Pro Tip 2/3Business Success
It implies success when used in a business context, suggesting profitable operations. 
Our store managed to be in the black within the first year of opening.
Pro Tip 3/3Opposite Phrase
Understand its opposite 'be in the red', which means to owe more money than you have. 
Last quarter we were in the red, but now we're in the black.