My camera is Sony DSC-T77. How to adjust its white balance?

T77 has preset white balance options: automatic, preset (daylight, cloudy day, fluorescent lamp 1, fluorescent lamp 2, fluorescent lamp 3, incandescent lamp, flash lamp). T77 has no full manual white balance setting, and can only select the preset white balance according to the light source. Pay attention to taking pictures under the light of single light source and pure color temperature as much as possible, and don't take pictures under complicated mixed light sources and color-cast light sources.

"Green is blue" means that the color temperature of the light source is too high. If the automatic white balance is still off, try fluorescent lamp 1, fluorescent lamp 2, fluorescent lamp 3 and flash lamp respectively. If not, we can only change the color temperature of the light source with a Rayden filter or a Rayden film. Of course, it can also be processed by software in the later stage.