On my store there are these annoying outlines on the main product images. The corners are not rounded on the image when I click on it, and I tried the code below but it didn’t work. The same thing is happening with my collection images as well. The images that I linked below show it so please let me know if there’s anything I can do. My website is pinkproductsonly.com
On top of what @Dan-From-Ryviu said (some of your images have white line at the bottom), your background color (#fc7f9c) does not completely match the color of your images background (#fc819d).
Finally, your image wrapper elements have gray background and this is your problem.
Try adding this CSS code (you can do it in “Custom CSS” setting):