Orange symbolises creativity and endurance. As a secondary color it combines elements of the colors used to mix it. It unites the creative passion of red with the clarity and wisdom of yellow.
Yellow is the color of the sun - the life support for our planet. As such it has come to represent life, energy, happiness, hope and wisdom.
White is associated with light, goodness, innocence, purity, and virginity. It is considered to be the color of perfection.
From Color Wheel Pro
Through its association with fire and blood this color is used to represent danger, anger and violence. For the same reason it is also associated with affairs of the heart: love and passion.
Although there are many different hues of blue, almost all of them are appealing and refreshing. As the predominant color of the sky, as well as lakes, streams and oceans; blue indicates freedom and space and therefore is one of the more relaxing colors in the spectrum.
From Empty Easel