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color-blind problem with double dummy display


sjcro

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The double dummy markers in green and red are not distinguishable for many people who are color-blind because red and green look the same. Would it be possible to make the red ones a different shape from the green ones? Or to distinguish them in some other way?. Eg. with - and +?
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The double dummy markers in green and red are not distinguishable for many people who are color-blind because red and green look the same. Would it be possible to make the red ones a different shape from the green ones? Or to distinguish them in some other way?. Eg. with - and +?

 

I have pointed this out in detail with references elsewhere.

5% of all men are red/green colour-blind.

 

The data did not say if that included Bridge-players but I have no reason to believe it would be different.

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