In this blog I will show you a method that works very precisely without affecting the entire picture. Honestly it is not from myself but I have taken if from the Photoshop Guru
Guy Gowan, you will definitely hear more about this here because I absolutely think he is doing the right things in Photoshop.
Just the first in line: why is the blue snow. This is because the snow is exposed in the shade, your camera gets confused and accordingly is unable to get the right color and color temperature to define and here is blue.
You can adjust the color temperature in cameraraw to change but you run the risk that this also screw up your entire photo.
I’m going based on a picture to show you, how you can do this in a very neat and nice subtle way can solve.
Step 1. The Photo

Just dived into the archives and looked a picture. What’s wrong with this picture, I took it around sunrise:
1. Indeed, the snow has a blue chamois
2. he is too dark
First I’ll show you how you can quick and dirty fix, but that the error is and then I will show you how things can. I dissolve than hue on the problem first and then I put the lighting right.
Quick and dirty
That is one way that many of us know, and that is through an adjustment layer and curves with the dropper.

Hum, it looks awful. The problem is that this is a rather subjective method that depends on where you prick and who see the quality of your monitor. THIS IS DIFFERENT en much better to control.
Step 2: Open file and checking your histogram
In this method, you go out of your histogram. You never lie histogram, it is calculated.The main advantage of this method is that you can do even it on a non-calibrated monitor.
Step 3: determine the color cast

The next step is to see precisely what is now the color cast caused. This is done as follows:
- Go to your selection tool
- Find a spot in the snow (flat without wrinkles) where you see the cast
- Make a very small selection (as you see on the picture)
Your histogram will show the gradient at that particular spot. In this case, you’re reading from right to left then your first encounter blue then green and then red. Because these peaks at all the red to make get the color cast away. Let’s start at the front. The blue
Step 4: remove the blue color cast
I will do this using a photo filter adjustment layer.

In order to correct the blue I take a picture yellow filter, since yellow is opposite color of blue in the spectrum. So I lift up blue by adding yellow. I slide the volume slider to the left of the filter and then add.
You will see the blue peak than the red peak shift. I do this as long until I get the blue peak around the red have here. I do not need to look at my pictures, my main focus will be the histogram.
Step 5: Tackling the green peak
Then remove the blue peak, there is still a lot of green haze. Time to address this.
I copy the photofilter layer and get a magenta filter to compensate for the green (opposite color)

I set my slider to the left again and start dragging the slider slowly to the right.

Notice that the peaks are nicely apart and that the picture already looks a lot better. The snow is not white but you see a shadow layer to have the whole picture is nicely balanced.
Step 6: Cleaning up my mess
To get all workable and later something to do I make these layers of a group by selecting the layers and dragging them to the folder icon

Step 7: We address the exposure
Yet the exposure of the photo update, which is done by an adjustment layer levels.

1. if you look at your histogram, you see that the right is a big hole, it indicates underexposure
2. I solve this by adjusting a low level in it,
3. then I closed the gap by bringing the slide to the left
4. I bring back the contrast and black slider left to right to move my nicely filled histogram to get.
Step 9: the final result

I personally believe that this method me the most control gives my original, very late and the great thing is, if it’s the first time doing and I have more photos in that series with the same problem my group just tow and therefore apply. In other instances do you do the same every time, see what you have peaks and then go to correct it.
I hope that everything is clear and wish you much pleasure in correcting blue snow. If you have questions feel free to drop me an e-mail