Olin Lathrop wrote:
> Tom=E1s =D3 h=C9ilidhe wrote:
>   =

>> I'm after sending an e-mail to a colour-blind association asking them
>> what are the two best colours to use. I'll let you know what response
>> I get.
>>     =

>
> There are various forms of color blindness, so there is no one right answ=
er.
>   =



Yes there are different forms, but it seems that there's a "common =

denominator" when it comes to choosing two colours to have side by side: =

Magenta and Green.


> For complete color blindness, which is actually quite rare, only the
> brightness matters, not the color.


As I've already demonstrated, I'm no expert on colour-blindness, but =

from what I've read, "full colour blindness" is a progressive illness =

that leads to actual blindness, and it is indeed extremely rare.

Red-green colour-blindness on the other hand is quite common:
    1 in 12 white people
    1 in 20 asian people
    1 in 25 black people


> The best approach to easily distinguis
> the states is to use separte LEDs.  That way the information is encoded in
> position, the LEDs are easier to drive, and you have a much wider range to
> choose from.

I'm not sure what you envision, but I don't see how it would look good =

if I replaced each bi-colour LED with two separate LED's side by side.

-- =

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