Blauwirkung

Blue is consistently ranked as the favorite color across cultures, genders, and age groups. Psychologically, blue promotes analytical thinking and creativity (a study by Mehta and Zhu found blue environments enhanced creative task performance). Blue's association with sky and water makes it universally perceived as stable and trustworthy, which is why it dominates financial, technology, and healthcare branding (Facebook, IBM, Samsung, Pfizer). Blue lighting in public spaces has been linked to reduced crime and suicide rates in some studies. In UI design, blue links became the web convention because early hyperlink implementations used blue, and the association of 'blue means clickable' is now deeply ingrained.