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I'm trying to make my year report look like a top-company report, and I'm stuck with pictures. Usually if the company colors are, say, blueish, all the photos in their reports are blue and grey. Same with red, green, etc.

Is there a way to color any photo from a photostock to the company color palette (blue and grey)? I say something of a kind in this question, but the result looks so unnatural.

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  • Input images & potential output style would be helpful pictorial additions to this question. – Tetsujin Dec 29 '20 at 16:34
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This is for GIMP

Let's say you have a regular colour photograph like this - I've just chosen something random, but it should work with almost any photographic image. Note that this will only really work with colours which contrast, for example if one is brighter than the other. Colours which are too similar in brightness won't work well because photographs need both lighter and darker colours to look realistic.

For the sake of this mini tutorial, let's say you have a light blue, and a darker grey.

enter image description here

  1. Do Image > Mode > Greyscale, then do Image > Mode > RGB

  2. Set the foreground colour as the darker grey colour, and the lighter blue colour as the background colour. If instead your blue is darker, then make that the foreground colour and the lighter grey as the background colour.

enter image description here

If you have specific colours and know the hex code, you can enter it here

enter image description here

  1. Open the gradient panel, and select the gradient that says: FG to BG (RGB)

enter image description here

  1. Do Colors > Map > Gradient Map

Here's the result

enter image description here

Here's another example using a darker green and lighter red

enter image description here

If you feel these are little too extreme, or unrealistic, then you could have the original photograph on one layer, and the gradient map effect on a layer above with reduced opacity. This will kind of fade the effect.

enter image description here

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