Daniel Chatfield - 3 Years, 11 Months, 2 Weeks, 1 Day, 23 Hours, 27 Minutes ago said
This is a simple captcha alternative design for my site. The user has to get the colour correct three times to be verified. They are allowed 3 incorrect attempts before lockout. I know it would be possible to write a computer program which could analyze the content of the images to do it but it is for a feature request form - doesn't need to be as secure as a recaptcha.