Colour/hue replace (again)

[James Mcilwraith]

Hello
I am trying to recreate an A2 poster which means stitching three A3 scans together. The scans have some uneven colour shading with darker red and grey in places which I would like to remove. 
In the past using Corel I would just use the "replace colour" brush and paint away my problems, but that doesn't work Affinity Photo with its hue approach. I have tried using colour select and "dodge" but I'd have to select each of the grey letters separately. If I just dodge the whole area the red goes too pale by the time the letters are white.

I could just type in again I suppose  

Any ideas gratefully received

thanks

[kaffeeundsalz]

I would simply use the Flood Selection Tool to isolate the red tones from the text and copy the selection over to a new layer. You can then do whatever you want with that layer to achieve a uniform color fill. Three minute quick and dirty example:

Edit: I forgot to mention that if you invert your selection, you can edit the color of the text in a quite similar way.

[thomaso]

Many ways lead to Rome. I prefer to avoid pixel selections for such tasks and try to use "automatic" colour calculation instead. For instance…

… a Curve Adjustment to brighten the white & dark tones:

… a Color Overlay Effect + Blend Mode "Lighten" to affect dark reds only but not white:

[James Mcilwraith]

Thank you both

1 hour ago, kaffeeundsalz said:

I would simply use the Flood Selection Tool to isolate the red tones from the text and copy the selection over to a new layer. You can then do whatever you want with that layer to achieve a uniform color fill. Three minute quick and dirty example:

Edit: I forgot to mention that if you invert your selection, you can edit the color of the text in a quite similar way.

 

55 minutes ago, thomaso said:

Many ways lead to Rome. I prefer to avoid pixel selections for such tasks and try to use "automatic" colour calculation instead. For instance…

… a Curve Adjustment to brighten the white & dark tones:

… a Color Overlay Effect + Blend Mode "Lighten" to affect dark reds only but not white: