I've recently purchased a replica hilt for Qui-Gon Jinn's lightsaber and it comes with both a black and a silver button bezel.
Looking at various stills from The Phantom Menace it appears that the prop uses the black bezel throughout the film. However, photographs of Liam Neeson with a gifted prop and pictures of the Galaxy's Edge version of the saber show it with the silver bezel.
I'm assuming that out of universe it's simply because many props were made for various reasons and the details might not be consistent.
Is there a canon answer as to what color is correct or should I simply pick the one that I like best?