Replacing the blue sky in a raw photo

[toi chungy87064043]

I have 2 raw photos both with a blue sky.  I want to make the colour of the blue sky of 1 of the 2 raw photos the same as the colour of the blue sky of the other raw photo.  Is there a way to do this using camera raw in photoshop cc ?

[D Fosse]

It depends. The basic premise of ACR - and shooting raw in general - is that you don't try to alter the actual content of the image. That's usually very difficult because you can't go in and edit on pixel level. That's Photoshop territory.

Tonal relationships, on the other hand, can usually be modified substantially, but within limits. Impossible to say without seeing an example pair.

[Bob_Hallam · Accepted solution]

It's possible given that the colors are at least blue.  Process the one with the correct blue, then open the second and use the same settings.  Then using the selective color adjustments make changes to the saturation, luminance, and hue to match the RGB values of the first blue.  If that result is less than your goals, then process both images the same way and post them so I can see exactly what your up against before providing a more specific solution. 

[toi chungy87064043]

Thanks.

Following the suggestions of you and D Fosse, I tried to use the match command in photoshop and was successful to make the colours of the sky in the 2 JPEG photos look the same.

[Bob_Hallam]

I must have missed the match Colors recommendation.  If you're just looking for how to adjust one image such as the one posted use Levels and select the eyedropper tool for the highlight and choose a good highlight then do the same for the shadow point with the shadow eyedropper in the Levels tool.  

That is a very basic easy quick fix and isn't a workflow solution. 

[D Fosse]

Agreed - Match Color is an emergency measure if you don't have time to do it properly.

If the two are within shouting distance of each other, Selective Color is the most effective and least disruptive to image integrity. Hue/Saturation is more powerful, but can break up the image in blocking and banding if you're not careful.