[jere]

Neat. This kind of reminds me of something I did a while back: I had a permissions manager that let you drag and drop groups to various actions, but the color of each group was determined by hashing their the group ID into a color.

The resulting colors had no special significance, but the important point is they never changed and it let you easily visualize what was going on. I'm sure this had been done many, many times before. The difference here is that the straightforward conversion from IPs to colors means similar IPs will look very similar, whereas hashing some value to a color results in similar values looking vastly different.