People have a tendency to associate colors with where these colors appear in nature. So, for example, without realizing it we associate soft shades of blue with the sky and sea. These associations make blue a calming color for most people. Asuka Obata runs a spa in Kyoto, Japan. All the walls of the salon are blue. Obata says, “It is essential that we create a sense of peace and tranquility. The color blue helps us achieve this.”