User blog comment:Kirkburn/Technical Update: November 14, 2016/@comment-146.198.29.151-20161116172611/@comment-126761-20161116182538

I believe this was part of the reason for the colour choices in standard MediaWiki (which we updated to) - but bright yellow is not a pleasant choice on dark wikis. 'Dark yellow' is also not pleasant, so we chose red as the replacement on dark wikis.