[jessriedel]

Isn't this a general argument against ever using red as a warning? Seems to prove too much.

Especially in this case, where there is unlikely to be a specialized class of scammers who go phishing only for people with red-green colorblindness. So long as browsers implement a feature that stops the phishing in 99% of cases, the scammers will try something else.

[brainfire]

It's an argument against using red as the only warning sign.

Compare to Chrome's https indicator- it turns the "https://" part of the URL green (which I can barely distinguish as different, so it is useless to me) and adds a padlock icon.

Colorblind-friendly graphs might use both color and symbols to distinguish elements.