How to blend 2 same colors, light and dark, in gimp 2.10

[fenpeppertree]

OK, the first two images are what I did using the smudge tool, and it worked fine. But that was just a test, and not the actual project I'm working on. The next image #3, is a part of the project. It is the dot of the letter 'i' in a text phrase. After I isolated the pink area, I tried using the smudge tool, but you can see along the edges how it messes up.


https://imgur.com/a/uniMtoh

https://imgur.com/a/xIlyyGc

https://imgur.com/a/VgcD1K9

Is there any way to get the effect in image #2 copied or something and just paste it in somehow to all the pieces (text letters) in my project?