What setting determines what selections look like

I can’t seem to find the right setting. My themecolor is a vibrant redish, but the selections look like poop, and of the items has border. How do i change the behavior. I have tried different plasma styles, application style, color theme and window decoration, but it stays the same.

The colors there are dynamically derived from the main colors.

i know. That wasnt the question. What does the border do and why does it look like poop. For example. i unfocus the dolphin window and come back and click del to delete the item that has a border and the selection assistant thing pops up, which means the bordered item isn’t selected.