Coloured Wands
Over the years Numatic have trialled many variations on their cleaners. The coloured wands are aluminium and are painted - usually in grey paint as standard, but sometimes black too. For a short while in the mid to late 1990's they chose to paint them the same colours as the cleaner, mostly on the Basil range of cleaner (Henry always used stainless steel tubes as far as my memory will let me go back).
I suppose as is often the case, Numatic must have realised that although it may have looked pleasing on the eye to some people, it added no value whatsoever, and would have cost them time and money to make & store batches of the same thing in many colours. I have seen this over and over again with many things - as time moves on the basic parts are often made in one colour and one colour alone. Dyson is a perfect example of that.