Colour blindness

[Walter Bender]

The most typical color-blindless is a red-green confusion. Black-green
should not be an issue as this is contrast in value, not chroma.
However, the point is well taken. Some of the on-screen color
combinations may well be problematic. The general rule of thumb is to
provide at least two Munsell value steps of contrast to ensure enough
contrast for legibility. I think we are OK on the keyboard itself in
that respect.

-walter

On Tue, Jul 8, 2008 at 7:42 PM, Pia Waugh <greebo at pipka.org> wrote:
> Hi all,
>
> I'm not sure this is the right list for this, but I had some feedback on the
> XO which I'm not sure has been dealt with. The black on green keyboards
> apparently might be a significant issue for children who are colourblind. I
> haven't pursued this but had the question posed from an education specialist
> I'm working with.
>
> Has anyone looked at this or have any feedback about it?
>
> Thanks all!
>
> Cheers,
> Pia
>
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