I'm learning my Nikon D3200. Lately I've noticed that my photos (manual mode) have an exaggerated blue hue. I've taken photos in Auto mode and emulated the aperture and shutter speed settings in manual. ISO is chosen by auto mode and doesn't tell me what is used, so I've used all the ISO settings in manual — to no avail. Auto mode captures more realistic colours of sunrise and sunset (with some grain). My manual photos of sunset and sunrise are too blue. I can't work out what's wrong, especially as I've tried many combinations of Aperture, Shutter Speed and ISO. My camera is well travelled. By that I mean aeroplanes, motorbikes and bicycles. It is used at the beach quite a lot. It is kept in its case. It is 18 months old and is taken with me nearly everywhere - it's had a life! Is this problem I'm having just the way D3200s shoot? Or is there a problem with the camera or the operator?!!!
Auto mode is auto exposure, and it also always uses auto White Balance and auto ISO, which cannot be turned off in Auto mode. Auto mode is "auto everything".
The A,S,P,M modes only set exposure, but can also use these Auto WB and Auto ISO if you enable them, however they can also be turned off. Probably are not on by default. This can make a big difference, but you can set them as you wish.
A blue picture suggests your white balance is Incandescent (for indoor lights), when maybe it should be Daylight outside. Or Auto white balance can make a fairly decent try at it too, not always right, but halfway close anyway (except Auto WB correction is a bad choice for sunsets). Auto mode will always use Auto White Balance.
See your camera manual index for white balance. It is a basic of photography. Experiment a bit setting it wrong once, Daylight indoors under incandescent light, and Incandescent outdoors in sunlight, and you will get the idea.
Your Exif data should show all the values each picture used, including ISO, white balance, etc. Basics of Exif data is shown when looking at the LCD picture result, then the Up/Down selector buttons scroll though several data screens, some of which show some Exif data (settings data used by that picture shown). One is like this:
A larger and more complete manual for the D3200 is the Reference Manual, available free here (click D3200): http://support.nikonusa.com/app/answers/detail/a_id/13948/~/nikon-product-manuals-available-for-download#Anchor-9
It's probably user error and easily fixed. Traditional film photography teaches you about ISO, aperture, and shutter speed. Digital photography, if you shoot JPEG images, requires mastering a fourth setting, which is white balance.
In M mode, you probably set the white balance to Incandescent (the lightbulb icon). In M mode, whatever you set last is going to be used. The Incandescent/Tungsten setting neutralizes a strong yellow/orange cast that can happen under some forms of lighting, so the image is shifted towards the blue end of the spectrum. You simply need to switch the white balance setting to something that suits what you're shooting.
This is also one of the reasons some folks prefer shooting RAW and processing with a RAW conversion tool, rather than shooting JPEG. White balance processing is done by the camera when processing the data from the sensor into a JPEG file. RAW files bypass that processing. So, you can, effectively, reset the white balance afterwards in post-processing if you forget to set it correctly when you're shooting. With JPEG files, unfortunately, that white balance color cast is "baked in", and going to a different white balance setting in post is possible, but problematic, because a lot of color information may have been lost due to the JPEG compressed.
See also: Raw vs Jpeg for non-professional use
While you want to be in manual mode for ISO, aperture, and shutter speed, you want to be in auto white balance to keep the white balance easy to manage. Also inksta, says shooting in camera RAW format gives you the opportunity to fix white balance issues in post-production.