Yellow, orange and red indicate day time. Red color indicates midday. Sky-blue, blue and violet indicate night time. Violet color indicates midnight. Green color indicates both the time of sunrise and the time of sunset. The flow of colors upward the rainbow from violet to red indicates the time from midnight to midday. The flow of colors downward the rainbow from red to violet indicates the time from midday to midnight.
keywords: day and night, yin yang, rainbow colors, solar time, sun time