When Voyager 2 reached Neptune in 1989, the previously pale planet was promoted to sky blue with red tinges. (discovermagazine.com)
Third, we also add a little lemon juice (or vinegar) to the batter, which causes a reaction between the cocoa powder and the lemon juice giving the baked cake a distinctly red tinge (reminiscent of a Red Velvet Cake). (joyofbaking.com)
Red tinged poop or poop with red flecks that is normal in consistency could indicate a milk protein allergy. (tranquilomat.com)