Very good question.
Blue is the color of the sky and sea. It is often associated with depth and stability. It symbolizes trust, loyalty, wisdom, confidence, intelligence, faith, truth, and heaven. Blue is considered beneficial to the mind and body.
Its been described as above online.
For me Blue is kind of ever soothing and an immense strong color to steady the mind. Its my fav color. For me as it symbolizes sky it takes my mind off to the vastness of infinite sky and oceans. Thank you