ELI5 White Noise - what are pink and brown noise?

What is white noise? What about the other colored noises? What do these noises do the brain? Why do some people use brown noise as a way to focus?   ... We explain like i'm five!    Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: takedown1001, acheron_apostolos, insecuredud99, wattwattwatt & smithgentleman   To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]