The Los Bravos hit from 1966 certainly claimed that Black is Black, but this isn’t true anymore.
The society Surrey NanoSystems developped a new substance called Vantablack® which is a is a super-black coating that holds the world record as the darkest man-made substance.
Vantablack absorbs virtually all incident light, making it ideally suited to addressing a host of light-suppression and light-management problems. It reflects so little light that it is often described as the closest thing to a black hole we’ll ever see.
See it in action here where you can see that nearly nothing is reflected by the Vantablack® surface.
When light strikes vantablack, instead of bouncing off, it becomes trapped and is continually deflected between the tubes before eventually becoming heat. Exclusive rights of Vantablack for artist use have recently been given to the artist Anish Kapoor. This lead to a major discussion about artistic freedom
Here’s the original hit by Los Bravos
And the real hint that Black is not always black can is given by the interpretation of the Los Bravos hit by Cerrone. ;-))