Color Deficiency- test your skills

Ever wonder if you're color vision deficient? (Commonly referred to as color blindness) How would you ever really know unless there were some specific image you couldn't read properly?

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To get a better idea of your specific color issues, here is an informal test you can take the original card version of Ishihara's color test was designed to be carried out in a room adequately lit by daylight under controlled conditions).

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Want to see more? Here's a cool image simulator

This is certainly an issue designers need to be taking into consideration, especially when designing environments for specific demographics such as the elderly (aging eye has limited color perception, etc.)  Any color deficiencies out there amongst readers? How do you cope?