The Slow Mo Guys covered a speaker with various colors of paint, then cranked up the volume to observe the patterns created in the liquid. Naturally, they captured the spectacle in front of the lens of their high-speed camera at 12,500 fps so we could enjoy every detail.
Artist Stuart Semple has devised a paint that is so black and so light absorptive that it makes objects look almost two-dimensional. It can even cover up shiny surfaces with a couple of coats, rendering them black as a country night. (Awesome lucky cat image via rainbrolly.)