What color should I paint the floor?

Well this place is starting to look like a proper dwelling! I realized that the ladder I got wasn't tall enough to work on the roof from the ground, so I thought o install the sub flooring so I can put the ladder inside. I had been trying to buy super light weight and super strong honeycomb panels made from recycled nurses uniforms for the sub floor from a company called Nidacore that would not get back in touch with me after the initial sample box they sent. Maybe they thought the sale of ten panels just wasn't worth it. I have found it to be fairly common that after much research to find recycled/environmentally friendly construction products that they are not really ready or available for consumption by individuals. I have had much more sucess reusing conventional materials. So, instead I bought ten sheets of 1/2 plywood and have started painting it. The sub floor will show through around the edges of the openings in the floor for the storage hatches. Maybe an deep indigo blue weatherproof exterior paint.
Into the living room and the corner of the bathroom
The above the bathroom loft bedroom
Master bedroom
Interior storage area under the master bedroom.

View from the back, through the exterior storage area, past the back of the washer/dryer and all the way to the kitchen