Minecraft wiki entry for Missing_textures_and_models, associated text: The texture uses a prominent black
 #000000 and magenta
 #f800f8 checkerboard in Java Edition or a black
 #000000 and magenta
 #fc00ff checkerboard in Bedrock Edition, in order to stand out as much as possible in most cases. Using bright colors is industry standard, and black and magenta is employed by other game development studios, notably Valve.[1]