Change black/white in f.ex. red/white?

[RolWg]

Hello together,

Although searching yet a certain time I don't find a solution to my problem. So I ask you.

I have a simple pixel image in black & white.
I 'only' want it now in red & white.

I suppose I have to change the palette? Or do I have to replace all shades of gray manually in the
palette with shades of red?

Thanks for Help.

 

 

[v_kyr]

There are several ways to yield that, one of them is to use split toning of the dark shadow areas and playing with the red level and balance here. Another one is to use the channel mixer and recolor adjustments instead.

[toltec]

It depends on what the image is and if you are using Photo or Designer.

 

If it is just black and white, you could create a red fill layer and drag that into the black and white layer. (Nest it).

 

 

You do need to remove the white first, Colour > Erase White Paper. (Photo only)

 

 

You can change the colour any time by clicking on the Fill layer and changing it.

 

If it's a greyscale image.

 

 

 

Place a red layer on top and change the layer blend mode to colour dodge, or something similar.

 

See blend mode set to Colour Dodge.

 

Again, select the fill layer any time and change it. 

 

 

 

[smadell]

Try using a Gradient Map adjustment layer:

Before...

After...

[RolWg]

Great hint :-) 
That's what I was looking for.