User blog comment:ChishioKunrin/Should we have a page about Remnant's naming rule?/@comment-25555436-20150207014952

Roman, is his name: Roman Torchwick. Which reminds of a Roman Torch...and there you get the color allusion.

With Oobleck, I don't know, but I've heard someone say his name sounds "green", and "kinda like Goo".