It certainly looks to be the case - here's a typical image:
http://guide.supereva.it/fortran/interventi/2009/03/lo-xerox-alto
On 14 December 2010 23:11, Nicolas Cellier
<[hidden email]> wrote:
As I understood it, even the Alto rarely had coloured mouse buttons,
they were most often black.
So virtuality of these colours does not appear to be a new thing.
Is that true ?
Nicolas