Great idea for the floor color, I know white illuminates a lot better than a dark color. Years ago at the power plant where i worked, the below ground level was always dark so one power plant relamped it to brighten it up but didn't paint the floor, they left it concrete. The other unit was painted white on the floor and 10 feet up the walls, and wasn't relamped. What a difference it made.
A sealed White floor and white ceiling with Sky Blue walls it will be! With my English football team logo on the walls.

Manchester City Football Club in USA MCFCINUSA