To adjust the white balance in nighttime photos and avoid color casts, it is important to first understand the lighting conditions in which the photos are being taken. In low light situations, artificial lighting can often introduce color casts that make the photos appear unnatural.
To correct this issue, it is recommended to manually set the white balance on the camera to match the type of lighting present in the scene. This can be done by selecting a specific white balance preset, such as tungsten or fluorescent, or by using a custom white balance setting to calibrate the camera to the exact color temperature of the light source.
Another option is to shoot in RAW format, which allows for more flexibility in adjusting white balance during post-processing. In editing software such as Adobe Lightroom or Photoshop, the white balance can be fine-tuned to achieve accurate colors and eliminate unwanted color casts.
Additionally, using a gray card or white balance target to accurately measure the color temperature of the light source can help in ensuring accurate white balance settings. By taking these steps, photographers can effectively adjust the white balance in nighttime photos to avoid color casts and produce more visually pleasing results.