CC Libraries are different than CS6 libraries.
CC libraries can contain many things - essentially anything that can traditional be saved externally - swatches, object styles, cell styles, table styles, etc. CC combined all externally savable items into one common location.
CS6 Libraries merely contain saved objects. With CS6 you create an object and then add that object to the Library. You could merely create a rectangle filled with your color, that rectangle can then be added to a CS6 library for later access. CS6 Libraries can't contain swatches or styles or anything which is merely a definition, Library items have to be objects.
The actual color swatch itself can't be saved to a "library" in CS6 but can be saved to an .ase file - which is a saved external file containing merely swatch definitions. When you load an .ase file, it merely populates the Swatch Panel, it doesn't open or populate any "library" panel directly.
So yes, there is a difference in Library operations between CS6 and CC versions of InDesign.