Vantablack
In 2019, scientists at the Massachusetts Institute of Technology made a paint even blacker than Vantablack.  This paint could absorb 99.995 percent of light.  MIT artist Diemut Strebe made artwork using this paint: Strebe painted a $2 million yellow diamond black with this paint.  This made the diamond almost disappear.  Strebe named the artwork The Redemption of Vanity. It is at the New York Stock Exchange.