What do the colors of Maneki cats mean?

Hello there, could you please explain to me the significance of the colors used in depictions of Maneki cats? I understand they are believed to bring good fortune, but I'm curious about the specific meanings behind the various hues they're often painted in. Is there a traditional interpretation for each color, or is it more of a personal preference? I'd appreciate it if you could shed some light on this topic for me. Thank you!