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Say I capture two photos of the same object. The second one with a light pointed towards the camera but away from the lens's optical path so the light creates bokeh. And in Ps, I want to stack these two images and, of the second image, I want the color of the bokeh to be changed; without altering the hue of the object.
I think the bokeh image must be on the top and how do I do this?

update:- for @sharkyenergy 's request for the I post these images. Please assume they are aligned. enter image description here

enter image description here

I want the color of the bokeh changed while the color of the watch kept intact. Actually I want to match the color of the bokeh to the watch, but that's not always wanted.

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    Can you post an example of the two pictures? not sure i follow what you mean.. I would use a hue saturation layer with a layermask to appy it only to the bokeh.. or a blend if, or a curves layer, but it really depends on the actual pictures what techniques you can apply. – sharkyenergy Feb 13 '17 at 14:33
  • Just make a selection around the watch and invert it. – ElendilTheTall Feb 13 '17 at 16:00
  • @ElendilTheTall but won't it make the whole image change the color? – user152435 Feb 13 '17 at 16:05
  • No - selecting the watch then inverting the selection will mean that any changes will be applied to everything but the watch. – ElendilTheTall Feb 13 '17 at 16:15
  • oh sorry, I omitted it in my comment. Yeah, as you've said, the changes will be applied to everything but the watch. But I want them to apply only to the bokeh. – user152435 Feb 13 '17 at 16:22
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I don't think image stacking is required at all. To make the image below, I:

  • Created a Hue/Saturation Adjustment Layer
  • Selected "Blues"
  • Adjusted the hue to get something close to the watch face and also tweaked the saturation and lightness.

I very roughly used a brush to mask out the watch from the Hue/Sat layer and then Gaus Blurred the mask to an extreme so that it applied very gradually. I used a brush at 10% opacity with pure black and white to clean up the watch (where Hue Sat overbled) and the areas near the watch. (as a general rule, it's better to use a lower opacity brush and make more passes than to use a higher opacity and a single pass)

enter image description here

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