The Auto function adjusts the light intensity based on a standard scale, so it automatically changes the red tone of the sunset. This makes the sunset image look like a daytime scene. As you can see, it's difficult to capture colors as you see them in real life.
If you want to capture the true ambience of the scene, you can select the light source to adjust the picture's color tone. For example, when you want to capture a beautiful sky glowing with the setting sun, select "Sunny" or "Cloudy" to emphasize the reddishness in the final image.
Using the ring is a much more intuitive and user-friendly process than accessing a menu screen.
With Manual White Set
Using white paper
White Set function adjustments are carried out by shooting at a white sheet.