Why does this single headline use two different spellings for the word colo(u)r?
Because the author is making a reference to a song with the title "Colorblind", as explained in the footnote:
> The post title comes from “Colorblind” by Super Furry Animals, a B-side to their Do Or Die single.
alt Hacker News
Because the author is making a reference to a song with the title "Colorblind", as explained in the footnote:
> The post title comes from “Colorblind” by Super Furry Animals, a B-side to their Do Or Die single.