If the white balance setting of the unit is set to Auto White Balance (AWB), the camera automatically adjusts the color tones of the images. Ordinarily, the auto white balance function of the camera can resolve issues with color accuracy, but sometimes certain lighting conditions can still cause discoloration. For example, the entire image may appear blue under cloudy conditions and white subjects may have a reddish tint under incandescent bulbs. If the auto white balance does not resolve the issue, try a different white balance setting, depending on the condition - Daylight, Cloudy, Fluorescent, etc.
Aside from the white balance, another factor that may affect the color tones of the photos is the LCD screen as the display may be slightly accentuated depending on the shooting condition.
NOTE: For model-specific information about the white balance options available on your camera, check the product specifications.
If the issue is still unresolved, service may be required. Go to Product Repair.