Visible light waves are categorized by length, and a waves length determines the colors that we will see. Violet wavelengths are the shortest waves of visible light. Red wavelengths are at the other end of the spectrum. These waves travel at fantastic speeds - 186,000 miles per second. Color perception is also affected by the environment in which the color is seen.
Daylight is rich in bluish tones because of the presence of ultraviolet radiation.
Incandescent light and candle light are rich in yellow tones. The perception of any color requires the presence of light. Our perception of color changes as the light source is changed or when the surface that reflects the light is stained or coated with a pigment. What we commonly think of as color refers to the chromatic colors. These colors relate to the spectrum that can be seen in a rainbow.