Since it's really impossible to say, we can consider the possibility that humble not-famous not-inventor alternate universe man might just live in a house with rooms painted various shades of blue because he loves the color so much. Or might run an etsy shop where the products are curiously mostly available in blue colors. Or he's a hobbyist 3d printer enthusiast and likes to use blue filament. Would he tell others that story? Maybe to bemused guests who remark upon entering the House of Blue. Who knows!
