The golden hour is also known as the magic hour among photographers. It is the first and last hour of sunlight during the day, when a specific photographic effect is achieved due to the quality of the light. Typically, lighting is softer (more diffuse) and warmer in hue, and shadows are longer. When the Sun is near the horizon, sunlight travels through more of the atmosphere, reducing the intensity of the direct light, so that more of the illumination comes from indirect light from the sky, reducing the lighting ratio. More blue light is scattered, so that light from the Sun appears more reddish.
In addition, the Sun’s small angle with the horizon produces longer shadows. Source To check out the time of the golden hour in your area, visit http://www.golden-hour.com/ Now, unlike the reddish light during the golden hour, a completely different light follows the sunset. During those 10 or so minutes immediately after the sunset, the sky and ocean share the same color. My friends, that results in amazing photos. Like these bellow or one of Venice in the Evening.