I had to yell to several of our senators earlier for unrelated reasons, and one has an email address hosted by an outside provider. Turns out the first time you email it, you get an autoreply using the Mailinblack service inviting you to type, in an image with several words, the one that's written in color. So in case you wondered whether someone would make captchas less accessible than they already were, the answer is yes.

(No advice needed - I'm not colorblind myself, it just infuriates me on behalf of any of their constituents who may be.)