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I have a black & white graphic, which I want to turn into a blue & yellow.

Black → blue,
white → yellow

I can do the first part by creating a solid color layer and change the blending options to "lighten", but then I have a blue & white image.

I have a vague idea that I should select highlights and shadows, resp., and turn the selections into masks for a solid color layer, but I don't know how to do this. Also, I'm not sure this is the best route to go.

Photoshop is version CS6.

EDIT:

I think I found it, but I'm not completely satisfied yet.

In the "select" menu I select "color range" and then "shadows". I then add a mask using the selection. I make that layer yellow. Underneath I place a solid blue layer.

The problem is that the edges are very hard and jagged, like when you convert an 8-bit grayscale to an indexed color image. So the mask seems to consist of black and white only. Any ideas how to solve this?

  • Possible duplicate of graphicdesign.stackexchange.com/questions/33690/… – Vincent Jul 10 '15 at 9:30
  • Hi Joris, welcome to GD.SE. Please don't answer your own question when you're not content with the answer, rather edit your efforts into your question. That way, we'll see your efforts and can help you along. If you have questions about this Exchange, have a look at the help center or feel free to ping one of us in Graphic Design Chat. Keep contributing and enjoy the site! – Vincent Jul 10 '15 at 9:33
  • @vincent I've posted as an answer because it may be a useful answer for others. I always read on SE that you're encouraged to answer your own questions. – Joris Groosman Jul 10 '15 at 10:04
  • Good point. Yet, you asked a new question inside the answer. To prevent that from getting lost was one reason for me to merge them. The other is that we've got some real bad feedback on questions that ask how to do something, but don't show efforts to achieve it by the OP themselves. So bad that it's a separate close reason these days. I guessed your own efforts in your answer would spare your question that fate. – Vincent Jul 10 '15 at 10:07
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The way I would do this is using a 'Gradient Map' adjustment layer.

  1. First make sure the Adjustments panel is visible. Go to 'Window → Adjustments' and make sure 'Adjustments' is checked.

Window Menu

  1. Click 'Gradient Map' in the 'Adjustments' panel.

Gradient Map

  1. Click the gradient in the pop-out(Properties panel), and edit. There will be default options, but you can click to edit any of them. Right hand side = black, left side = white.

Gradient

  1. You can click on the layer in 'Layers' to edit as you need. You can also edit how sharp of a drop off the gradient has... IE. where the parts between white/black become a combination of your new color combo. This isn't a hard re-color, but as it states a 'mapping' of a 'gradient', so it might not be the exact result you were hoping for. Give it a shot.

Layers Panel

Final result:

Final Result

  • Then what? ................ – Joris Groosman Jul 10 '15 at 9:13
  • Just updated-- apologies. I submitted it too early. Added a visual guide- let me know if that helps. – Nathen McVittie Jul 10 '15 at 9:16
  • 1
    Good job. It's just a bit better to have the images in between the text so it's more clear which image goes with which step. – FrostyZombi3 Jul 10 '15 at 10:10

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