It looks like a colourspace like sRGB or other, it happened to me a long time ago between browser like IE and Firefox, picture have different colour because of such issue.
You should check which colourspace the picture use and which are used by default in Godot with the shader or whatever you have to deal with the texture.
Also, as Tomcat wrote, share a minimal project in order to get help if that is really what you want. We cannot just magically guess like GodetteAI !