Variation of Monochromatic

[Fritz 12345]

I'd like to create a variation of a black and white image but replacing black and white with opposite colors such as blue and yellow. Dark black would be blue and white would be yellow and the tones in between are a mixture of blue and yellow depending on their greyscale values. I tried to do this with two colored pixel layers and the blending range masks, but it won't work since after applying the first mask, eg blue, the greyscale value of the blues that used to be blacks, is not zero anymore, so there will be a tint of yellow added. Maybe the solution is blend ranges and I simply do not apply them properly, but I struggle to get the effect I'm after.

 

Does anyone have an idea of how to solve this, please?

[GarryP]

It sounds like the Gradient Map Adjustment could be of some use – see attached image.
If not, we might need an example of ‘before and after’ that you are trying to replicate.

[Fritz 12345]

Thanks, Garry. I don't have an image I'm trying to recreate, I just have something in my mind (although I'm sure what I'm after is not original). Let me try to illustrate. Here is a base image that has full black, full white and some grey tones in between. I added a green layer and used blend ranges to turn the whites into green, leave the blacks untouched and get a grrenish representation of the greyscales tone.

Now I'd like to add the same effect with pink, but applied to the blacks / dark. The idea is that afterwards I have an image where everything that was originally black turns into pink, and everything that was originally white tirns into green, and the grayscale values become a mixture of pink and green.

However, as I apply the pink layer, it affects the greens because the greens have a tonal value that is different from the whites in the original.

 

Does that help?

[thomaso]

While the mentioned Gradient Map Adjustment appears to achieve what you want (bottom example), alternatively you could apply the two colours to separate objects for more influence on the colour balance in the mid greys of your image source. For instance with a fill colour applied to the bottom image but for the upper image a parent rectangle with fill colour + blend mode 'multiply' + blend curve. (unfortunately Affinity just refuses to render the layer thumbnails for unknown reason)

[Old Bruce]

5 hours ago, Fritz 12345 said:

Thanks, Garry. I don't have an image I'm trying to recreate, I just have something in my mind (although I'm sure what I'm after is not original). Let me try to illustrate. Here is a base image that has full black, full white and some grey tones in between. I added a green layer and used blend ranges to turn the whites into green, leave the blacks untouched and get a grrenish representation of the greyscales tone.

Now I'd like to add the same effect with pink, but applied to the blacks / dark. The idea is that afterwards I have an image where everything that was originally black turns into pink, and everything that was originally white tirns into green, and the grayscale values become a mixture of pink and green.

I would just use a Gradient Overlay with the Pink and Green at the extremes plus a neutral Grey to control the balance.

[Fritz 12345]

Thanks all for your help! Works like a charm. Thanks!!!

[RichardMH]

Note that using blend modes with the gradient map gives a lot of flexibility. Pretty common to use Soft Light.