black on black

1. Of or pertaining to interactions between two or more African Americans, usually regarding violence or crime. The speakers exhorted the community to renounce black-on-black crime. Many studies have been done on the rates of black-on-black violence in this city. Black-on-black crime in this city is much more nuanced than what that senator is claiming.

2. Completely misleading, invisible, or indecipherable (either intentionally or unintentionally), as of black text printed on a black or dark background. There are pages upon pages of sub-clauses and exceptions in this agreement. The whole thing is rather black on black. I hate these black-on-black warning labels. You can't make out what they're trying to warn you about at all! If the contract was black on black, no wonder they were able to steal so much money from you.

3. Of an automobile, having the entire outside color scheme done in black. Some people prefer sports cars with bright, flashy colors, but I prefer mine to be black on black. My mother warned me against getting a black-on-black car, citing the dangers that would come with driving at night. You want the entire exterior to be black on black? Really, no color at all?