How do I change a specific colour in a specific layer?

[migf1]

(06-12-2020, 01:41 PM)AnyOldBiscuit Wrote: I want to change the colour of drawn lines from one shade of green to another. All the green lines are in one layer, except for a few which are in another layer (I also want to change these ones). I have tried the bucket fill tool, but it ends up filling in the edges so it no longer has anti-aliasing, end, as a consequence, also fills small gaps. Somehow, the bucket fill tool worked fine to change colour when I tested it on a blank canvas. How do I change the colour without affecting the entire image? I only want to change the pixels that make up the lines.

You can also try to Lock the Alpha Channel before using the Bucket Filling. In 2.10.20, it is the last one of the 3 Lock icon, right below the layer opacity slider: http://prntscr.com/sz46ct