I am creating a PDF file using the Wkhtmltopdf library.
Everything works fine, except for one small detail: I overlap two images with a transparent background on another background image.
This is the result: 
The background image is an image with trees and sky, each symbol is in a different image with a transparent background. Thus, the result is quite perfect, with the exception of the gray border around each person.
Can I delete it?
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