I wonder if there were an album that has a cover with one and only one colour.

Metallica's [*Black Album*](https://en.wikipedia.org/wiki/Metallica_(album)) has a snake and the band name logo written on it.

The Beatle's [*White Album*](https://fr.wikipedia.org/wiki/The_Beatles_(album)) also has the band name on it.

I'm looking for albums that reached Billboard, which cover has absolutely nothing else than one absolute colour, not varying shades of the same colour..

I am not trying to identify a specific album, I just want to know if some artists dared to do it, since the ones I know still have some writings on it.