I hope this is focused enough: my question boils down to: "How do people living in a Stanford Torus experience the sky?"
Context: Operating on the assumption that we're in a fairly typical Stanford Torus (1.8km diameter, primary and secondary mirrors provide sunlight, mixed agricultural and living use around the rim as shown here: https://en.wikipedia.org/wiki/Stanford_torus), what would the 'daytime sky' look like to a person standing on the 'ground' inside the ring?
The interior illustration at the link above shows the sky/mirrors with a bluish tint, but I can't imagine why unless that's an effect of the glass used in the mirrors. The sun seen from space is just a blinding white sphere against black. Would it be likely that the mirrors would be treated somehow to soften/filter this effect both for human comfort and perhaps to create more optimal wavelengths of light for the crops?
Also for the comfort of the people living in this environment, would it be feasible/practical to create a day-night cycle by changing the position of the secondary mirrors / shutters (seen here: https://en.wikipedia.org/wiki/Stanford_torus#/media/File:Stanford_Torus_interior.jpg) so that the sunlight that the primary mirror bounces to the ring simply wouldn't be reflected in by the secondaries? Basically just shuttering the inhabited portions of the ring for the night? (I imagine it would be more energy-efficient to keep the dedicated growing portions of the ring lit at all times.)
Thanks in advance for any and all advice!