Some words about color symbol of fidelity, faithfulness and affection

In many cultures blue symbolizes the sky and eternity. It can also symbolize kindness, faithfulness, affection, and in armory it stands for innosence, honesty, good reputation and loyalty. "Blue blood" speaks of the noble origin; the British call the true Protestant "blue". In psychology blue has always been considered the lucky color. No wonder that the blue bird is considered to be the symbol of unattainable peace and abundant life. However, why try to catch the blue bird, if the color of its feathers, namely the bue, can bring happiness? The blue color dominates in teacher's clothing. What kind of a teacher is he or she?