I am very new here and I noticed that everything in $\color{red}{\text{MathStack Exchange}}$ logo are red. Is there any reason for that? Or devolopers just randomly chose red colour!!! I guess old users may have a answer.
(There may be some historical reason, maybe!!! Just curious)
Note: I mean by everything is the logo of MATHEMATICS, OP's upvote, downvote, flag, the identification of moderator sign etc.