[Harp-L] color coding keys

[Vern]

Because it doesn’t help the color-blind isn’t a reason to not help the other 88%.  The color-blind are no worse off with 12 colors than they are with just one.

However, a reason not to do it is that you have 12 products to manufacture, inventory and ship instead of just one.

If you don’t mind selling 12 products, then scan the letter key into the surface in relief or in a contrasting color. This works for anyone who can see at all.

Vern

  
> On Mar 16, 2017, at 11:26 AM, MANFRED WEWERS <mwewers at xxxxx> wrote:
> 
> Ten per cent of the male population is color blind. 12 colors can be a problem.
> Manfred