I'm colorblind as well, and did a little double-take when I read this comment, but I think you misunderstood. "Other forms of text—for instance, links and code—

I'm colorblind as well, and did a little double-take when I read this comment, but I think you misunderstood. "Other forms of text—for instance, links and code—are slightly lighter and sidenote numbers are bright red to distinguish them from inline text." Only the sidenote numbers are bright red.