The Root Chakra is known in ancient wisdom as Muladhara.
The Root Chakra is the energy center located at the base of the spine.
The Root Chakra is the first gate of manifestation.
What is not claimed here. The material does not say what closes a center or what opens one, so neither do we. The familiar red-to-violet color chart is a twentieth-century Western arrangement rather than an ancient one, and the Sanskrit sources describe the colors differently again.
This one is not scanned. The base of the spine is dense bone, and bone holds almost no air. A tone sent here finds nothing to ring inside and comes back unchanged — so there is no note of yours to bring you, only the sound we sent. We would have to write you a reading instead of finding one, and we will not do that. Offering a reading here would mean generating one, so we do not.