Thread:TheRealPella/@comment-26942307-20151128082104/@comment-15636815-20151128084157

Technically, we don't. We remove the existing background and make it transparent. Then it will match the background color anywhere.

Any graphics editor program (for example, PhotoShop) should be able to do this, and they should provide instructions, too. I use GIMP because it's free. I have instructions for removing backgrounds using GIMP around here somewhere. Let me see if I can find that for you. Also, GIMP's user manual is available in Danish, so that should help you, too.