First black IBM 5150 mid 1980's
They weren't all beige; the submarine ones were black. They were delivered in beige but the only place to store them on hunter killers was a cupboard which was part of the diesel exhaust system. Whenever the snorkel went under a wave at periscope depth, the engine would have a mild cardiac arrest and belch out sooty smoke. The PC's always rotated back pitch black.