Acorn's line of ARM-based Archimedes computers was common in UK schools in the 1990s, and many classrooms had an A3000, A4000, or A5000 computer.

The function keys of the A3000 were a distinctive red colour:

[![Image of A3000 with red function keys][1]][1](image from [Wikimedia Commons][2])

The A4000, and A5000 (pictured), had dark grey function keys, similar to PC keyboards:[![enter image description here][3]][3](image from [Wikimedia Commons][4])


Why was the A3000's keyboard so colourful by comparison?


  [1]: https://i.sstatic.net/OERdM.jpg
  [2]: https://commons.wikimedia.org/wiki/File:Acorn_A3000_front_view.jpg
  [3]: https://i.sstatic.net/35VJT.jpg
  [4]: https://commons.wikimedia.org/wiki/File:Acorn_Archimedes_A5000_open.jpg