25 years of safe CVD aviating proves they don't have a problem recognising green red lights. Not one known incident or accident. So rest easy mate, your CVD captain will still keep a cool head while you're filling your little undies in an emergency. The CVD aviators are colour deficient, not colour blind airsupport. You are untitled to your own uneducated opinion though. It's does sound a little like you are quite the amateur with statements like that, either that or a representative from CAsA itself trolling on a real aviators forum.