For the Toyo Ito library the Cyan color to me is an example of collage a pre set/well thought out spaces because of their functionality to the library. Meanwhile the magenta and red offer a versatile spaces since nothing is truly set down and could be shifted around. The rest of the space is what makes this library so amazing it creates nooks of variety of spaces offering more or less intimacy in space and is treated as such by people using it.
Collision= When two spaces come together to create one singular one and there is a clash in the design.
Collage= a mishap that occurs when a variety of ideas come together to form one free flowing one thats coherent and easy to process.
Coincidence=A space who has different usage thought from the intended one.