Color exchange not working

[chaslinux]

(11-21-2019, 01:26 AM)She Wrote: Hello

I am new to gimp. I'm trying to use colour exchange and nothing is happening. I use the colour selector within colour exchange to select 'from' and 'to' colours (as in: https://infofreund.de/gimp-replace-color/). Absolutely nothing happens. Why is this?

I suspect you probably did what I did and converted the image from RGB to Indexed. In my case I converted by image from RGB to 4 a colour index and I kept trying to use Colors > Map > Color Exchange. How can you swap 4 colours in a palette if only those 4 colours exist in the palette?

Converting the image back to RGB did it for me. Now when I try swapping the colours it lets me swap the colours I have in the image with the colour palette.

Very late reply, I found this forum looking for the solution to this and then it occurred to me the reason why.