Can we have a 'real'-black theme ?

The name suggests black, however the background-color is not actually black:

https://github.com/hakimel/reveal.js/blob/7de6ccb65b98f657f757cb5610613ad9d4f3da2b/css/theme/source/black.scss#L19

for OLED displays that can do nice black this is 'wasteful' ;-)