How can I find Crawled Properties?

We have many sites with numerous document libraries. Many document libraries contain a "Color" choice column. If I want to make one of these many "Color" columns a Managed Property in Search Center, how do I do this? How do I find out from the crawled properties in Search Center that the Color column is from site X? In the properties of the crawled property, I see a Property Set ID. Can I use this to find the assignment to the column whose library it belongs to? If I have multiple columns named "Color", will it become just one crawled property?