I filed a trademark with colorado Sec of state. Is this the same as a Trademark with library of congress??
No. The trademark you registered with Colorado says only that no other business in Colorado has registered the same name. The name you use in Colorado could, however, infringe on another trademark holder's rights.
When registering a name with your state, the state advises that you do your own trademark search to make sure the name you have chosen is not in use elsewhere.
It is smart, therefore, to search the USPTO database before choosing a name and then expanding your search to look for the same name that is in use already that is not registered.
Trademarks in the US do not need to be registered to gain rights in the name. It is the first to use a trademark in commerce who is the presumed owner of the mark (although this is a rebuttable presumption).