'Replace Colour' - How? (Affinity Photo)

[FLaci]

2 minutes ago, Brian_J said:

To quickly change the color of objects that you created and assigned colors to (i.e., vector objects, text, etc…. not a photo), I would use global colors so that the colors can easily be changed.

https://affinity.help/photo2/en-US.lproj/pages/Clr/globalClr.html

It is a screenshot of a webpage, there are no vector objects, texts whatsoever.

[Affinity-Inspiration]

10 minutes ago, FLaci said:

It is a screenshot of a webpage, there are no vector objects, texts whatsoever.

Do I understand that you are trying to change the colors of a screenshot?

[FLaci]

6 minutes ago, Affinity-Inspiration said:

Do I understand that you are trying to change the colors of a screenshot?

Yes. For example, I just took one of your comment. The "Unread replies" at the top is #196299, but I am curious how it would look like _specifically_ in #79B200.

#EDF2F6, the colour of the background at "17 minutes ago, FLaci said:" to be replaced with #9AD898, etc.. This seems like it could be a 1 minute task, just entering the values somewhere, but everywhere I can only find CMD+U, and different types of HSL adjustment (where I cannot provide the exact colour code I'm looking for), or making selections either manually or with the flood select tool - both seem to be unnecessary tedious and complicated for this job.  

[walt.farrell]

1 hour ago, FLaci said:

The "Unread replies" at the top is #196299, but I am curious how it would look like _specifically_ in #79B200.

You could use the Flood Selection Tool to make a selection of the area that has that color, then select the Paint Brush Tool and pick an appropriate hard round Basic brush, then set the color to what you want, and paint.